Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a2f3e3c98e639f…

MALICIOUS

PDF

85.9 KB Created: 2021-08-13 23:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8b864fcaf1bc128c530c9c4d666daa32 SHA-1: d32983db9ac55cb756c1797051a9218831e0cb17 SHA-256: 80a2f3e3c98e639f2f4a137e244761ae7445c951534408841b67da09add27d9b
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, indicative of a link farm used for phishing or malware distribution. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into believing there are new payment instructions, a common tactic in business email compromise attacks. While no scripts were directly extracted, the PDF structure and heuristic firings point towards exploitation and redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • 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://pjkconstruction.ca/images/file/texusokimizega.pdf In PDF document text
    • http://allprintusa.com/admin/images/file/12896274724.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/14271542027.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/16530334841.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/22972087979.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2d844092---98280007305.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b88357c1f0a7eafd277f0b9748108093/96486562672.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/69101496369.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078660524126---46639586932.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/24861851193.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607269cc0798c---26849418977.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/kavoso.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ad2927359---76557812048.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/als4ukncpv9vmfrk433h61l5si/35207170487.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1620863487bc343591800407be2aa22c/kubegabivegusuwasux.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/gukijinululunasirubakil.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c677db393abb53814ae43eb2fd7a7e41/divezatipo.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/fikomogemugugexonin.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/476d600cf9af904d641a24ac44de935e/gakezivorinibotabalu.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba3ad15f8---duwobob.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6cc4a05311777e69ebea3d690b5f612a/gorope.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/71671850976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+main+idea+of+the+lotteryPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 17176 bytes
SHA-256: 60c25b7cb879666c60e615c867304dee07f9fe0e8d522cc29f8d9df4df771833
font_01_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13082 10724 bytes
SHA-256: 939b061a236eae05435824943972c727f447431041aad77bff9ccdac36177f73

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