Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c61f26b605e237…

MALICIOUS

PDF

89.5 KB Created: 2021-07-03 19:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fbdf4506f5e56291da100ab7b2a68323 SHA-1: c2f681380c6e18998e7b51104033ce5e4fc949d7 SHA-256: 74c61f26b605e2376c4317256420184e8a81fa6c4823c47a4e42e64f3ab7a898
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://laborke.ru/uplcv?utm_term=how+to+find+old+dms+on+instagram PDF link annotation
    • http://travellightnepal.com/userfiles/file/kofowevasezixeb.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0427d16da---nekumoso.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/5e83e7f3856f6cd12e20847a7bdd971c/garewumasabunutazedo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083de72d9c71---31968233086.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/favofezona.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/44fee224e60404f618f1072fbdd4818f/73817801825.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/2b1f4e3ecd8a58427f1ef7692acb4aaa/boxolitizizin.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/busiliv.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f728909edb5ea613c594575583b75ee8/pesejigaveluwetegotanegol.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d275e94e63f64905ede0ae153061d1ea/lelazumerezimugukavova.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/bukagi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59e2229d01---vakikirumofezenodalafo.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/qm333s80i010bun5u9kal1vaas/45725539949.pdfIn PDF document text
    • http://www.bandungmesin.com/file/48348340129.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/9a6e2848f5969df5f9a6122fc68b22b9/81354804467.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/kejetav.pdfIn PDF document text
    • https://marosme.ro/hirek/file/71203107562.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835edab479f---vanoxologidapiletuboki.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3a2989c5---72097162700.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/25069520978.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/37d97c3a73f7834674ab7f483a6e243a/mudej.pdfIn PDF document text
    • https://designclarf.it/file/dekavovemojavepomibiso.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/sizid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 10644 bytes
SHA-256: 5cbef36e316312d8371a5c3a68b88f4f9218c434a5ade0774805ec02a3820e8f
font_01_sfnt_off000114d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D3 16852 bytes
SHA-256: 65de10de37a9e53e255c91927847f574b84f6461e6982197e0d6e9023c5ed369
font_02_sfnt_off000140da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1