Malicious PDF — malware analysis report

Static analysis result for SHA-256 94358228d997381c…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 17:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 82752d344f2f232325da3e568e68dfc9 SHA-1: d8771dcb4c4fc0bb02823326bc21fb0392b5505e SHA-256: 94358228d997381c4ca59a1d958ec82174f3ae14458df0843d8d886bed103a73
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a payment redirection lure, aiming to trick users into clicking links that lead to compromised websites. The presence of multiple links on disposable hosting and the ML classifier's high confidence score indicate a malicious intent to redirect users for fraudulent purposes. While no scripts were directly extracted, the document's structure and embedded URLs strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/80686898320.pdf In PDF document text
    • http://caydinhlang.net/userfiles/image/file/33826872275.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef450b93dc---15508896196.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb766848d2---6423774688.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/jodobita.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f44eefe2460---situvixomorixitapofufiw.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/50158824900.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/82129447661.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec20bc7b97---pulunewojoki.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c3c08d1d5---joluvaguneziwoxabomola.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/f04d7b033384f3637af9ce5a98c1df38/88520692687.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64a756901---64798172990.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b09cfe9f34---nafidiz.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/15978275418.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103252b32b94---gumidopo.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/68603792198.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/bavelo.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/jupijowewafufepur.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/bufodavaven.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078141f85e31---fabasu.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/lojofizukag.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/dekovofisukewuzovixig.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/tisifexoze.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/tagufexanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=nuance+pdf+free+trialPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 18244 bytes
SHA-256: aea5b654624316c910175bc1fa6a97c222133e1c4647d4b6de2e7cd2d0a41eee
font_02_sfnt_off00012344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12344 10400 bytes
SHA-256: acb343ce440485a82e7183b7b1ac5288fd98843a269c86eb353e01cfb50e32cf

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