Malicious PDF — malware analysis report

Static analysis result for SHA-256 e196c95b6a0a418c…

MALICIOUS

PDF

92.3 KB Created: 2021-07-13 11:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 21837da4b15cf0c6c3deb6bb16801966 SHA-1: 0cba0a75ea542937a45a7c420c4e13af66b287ca SHA-256: e196c95b6a0a418cf990b672479a342c9198f024c78b5d38badda4ef5e06dfca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities or redirection to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a84349416f5---kafirogajebafabefiki.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/1553a9681fec37469a6c0d98ca67fa29/debetudetirasu.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/73872487571.pdfIn PDF document text
    • http://eva.am/files/2ae89640a43dd168.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/37874291580.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/tulivurukudegakela.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/xesosamiruwo.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/vuxukaka.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a8b5ae0ac63a040325bccdbd08f11f06/78888782524.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/padurunanafok.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/zugarutatulugenakiletus.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/dagevugomawigezav.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/51499527773.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/trpb5mjcairrj8q1bk7j0g3dmp/82463090736.pdfIn PDF document text
    • https://makenie.com/upload/files/22764202691.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e193cb06e---gigatuvedesuf.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/q1qjdg9vilgo2gbbfop2ou77qd/17358768114.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160798a841361b---23324122809.pdfIn PDF document text
    • https://austarpharma.com/upload/files/zogunedaferep.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/gewozuta.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/rakanivoroteramifa.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5b79e69d---tulop.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/11908587445.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5b8260a466bfcba0804819646cdddce4/16869026954.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a240746071e---40381951931.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=if+a+body+of+mass+m+is+moving+on+a+rough+horizontalPDF 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_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 11100 bytes
SHA-256: 4134599bbf8c50cf7f977fce7ba6ded99738fde7bbaa64653bf2490e9c97baa0
font_01_sfnt_off00011f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F58 16840 bytes
SHA-256: c93460149e8f369dacc73ce4ab346719e0a228dfdb9ae3d912c7bdd0a5b0ebea
font_02_sfnt_off00014b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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