Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf478d69175cfcd…

MALICIOUS

PDF

193.7 KB Created: 2021-07-14 07:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: beaa043bfcce0f77397dd360a70f2734 SHA-1: 1fdefcd7cac7e227de6341f2b4980aab33a62a33 SHA-256: ddf478d69175cfcddf4dab8360cca9bf884e69c37c49fdc2d2804f1771ee1f2f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised WordPress installations, suggesting a link farm or redirection mechanism. The heuristics indicate lures related to urgency, fake invoices, and advance-fee scams, combined with a visual download button. The primary attack pattern involves tricking the user into clicking these links, likely to download a secondary payload or lead them to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9430

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=pakistan+studies+book+for+bsc+pdf+in+english+free+download PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b0fef4d45d10e733b6a67d61be15dd54/674997808.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/94776154474.pdfIn PDF document text
    • http://envigest.cz/upload/file/43243617676.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/48374224342.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9163b1bd---rizosizagujofawajozef.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ef214ff8---fadegivajo.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d578163f---nusinepuwovolono.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d66d906989---77385923725.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ddbecb7a1320d5cb88c63d1f046adc58/nubumowiw.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ts4c3vgqrgf0g4dsrpr0j7simu/pixinekukonix.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/47415720140.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/miwufaze.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/fanevigejasesunadodonod.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/4869c1ff656db95fd45ef099f7d32938/pifitadebobid.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/67916960515.pdfIn PDF document text
    • http://candientushinko.com/images/file/81199489884.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c6904d7199e73f6d505ab5abdfa992e3/wajiw.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a477b0cf7f---90631027089.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9d2437cc4d7973aaa2370ec8046bb3f6/naxudar.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607176b930f58---60919198047.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9938b167c---71133228330.pdfIn PDF document text
    • http://naucseto.cz/storage/48525285494.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/zawikusoxafunok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D92 19056 bytes
SHA-256: 6cf425fd765179ffc63bc01928cc99c8cd864ea6ee8931daae397343c84af337
font_01_sfnt_off0002a0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0AC 11320 bytes
SHA-256: 1c56236f0898376c3d0ede47f79ebd90b281fa4a07746b4c240bd2e54ca7de15
font_02_sfnt_off0002badd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BADD 16216 bytes
SHA-256: 8c2e9d80d580d08964a5048de7b59c27befd741f1c379efd0abbd599686b3e88
font_03_sfnt_off0002d08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D08A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0002e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E897 3752 bytes
SHA-256: 77b6b20d55a9509e429fb551b0c00c1a45494fb35cc454df2ed4fe373fa95d9e

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