Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c9393c596ed51c…

MALICIOUS

PDF

68.1 KB Created: 2021-06-11 06:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d09898e30929f162b1a415232187ce3 SHA-1: d37a48d28e51bacfedce6efba41a191cb7edf443 SHA-256: 02c9393c596ed51c2407437846a667c23eb5ff16d7d06e657a941903ac91a582
184 Risk Score

Malware Insights

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

The PDF contains a lure for 'free onlyfans account logins' and includes multiple links to compromised WordPress sites hosting PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to download and execute further payloads. The document body is heavily obfuscated and appears to contain junk data rather than a coherent message.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • 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
  • 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://pixomot.ru/uplcv?utm_term=free+onlyfans+account+logins
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/a535lfvhkl7raqpgfnn635v3v3/dinusosagolifedogoto.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10f37154b7---susitubog.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0690acf6f---dedogaxibidowida.pdf
    • https://alamansyria.com/userfiles/file/33966251602.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/297e286dc014a19d5a2577d3c3f299fc/73623926375.pdf
    • http://www.findvoters.com/userfiles/file/suvinatizojelijukafefaw.pdf
    • https://blindnow.com/userfiles/file/rofegopisip.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e6879769---36663788550.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/f3acb195802fb15c74e467860ec91122/larew.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913636db011---79016623255.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b976c2dd570---67704973293.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/69e64b88e0fcc8a1f921c22cc6919c06/lesexeberofevolokavoz.pdf
    • http://supermarketdv.ru/files/file/69231618634.pdf
    • http://savitapiti.org/ckfinder/userfiles/files/12087055994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda9.bin
5741a6b206319eaa33df6f48f35a2f552a62b522d27f1f4a64af4918079d160c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA9 5108 bytes
font_01_sfnt_off0000df27.bin
a6fa8331c30a1c5397738e2465cf8e8bfd75586a1e5059066f3052a4d8ccd1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10340 bytes

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