Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9f9171936314af…

MALICIOUS

PDF

83.7 KB Created: 2021-06-28 18:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f8218c6f5421fb6b454c9ddc1b328dd SHA-1: c4096095fe55ee3a1f5c745e3c18149ab81dd4f5 SHA-256: 0d9f9171936314afa198ca65a3f0faf36645030394531b0525e6931025d452f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e03822dc2---rowatixov.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/35872d45e50b335c3a7c80bb89384f4e/movadefub.pdf
    • http://asckhn.com/acskhn/userfiles/file/94804928585.pdf
    • http://studiotecnicobonoli.com/userfiles/files/7994717235.pdf
    • http://nuovartea.eu/userfiles/files/93431342788.pdf
    • http://vipforiraq.com/userfiles/files/77337592693.pdf
    • http://dailitara.lt/bites/uploads/file/dasodikit.pdf
    • http://montgomery71.com/clients/34132/File/xibepesef.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608722c58e91c---rutegererapanaboban.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/62d8035ea7d0e138e6e1b138f2cd0a61/kevew.pdf
    • https://anakmeong.com/contents//files/17566809639.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/a9a6b4fd5715a3e7039666c119a1e7dc/64883264338.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084cae454c3d---gobotetaxonoj.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160890dd47f6ad---99119009981.pdf
    • http://kulturazebrak.cz/userfiles/zilixovorokimosibola.pdf
    • https://cafepiolho.com/uploads/assets/kurit.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/88548999af991815ee3bd1bd0415e9b3/40540225341.pdf
    • http://anandamsanyal.com/userfiles/file/vawilu.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/amvs59e7tur616ua5ktd5ia043/busetedibudafuxeliduz.pdf
    • http://smclassof57.org/clients/34860/File/lurajeb.pdf
    • http://pastoret.it/userfiles/files/9309818421.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d431db06---rutesafazebevozofupuvo.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aaf537835---pofufataw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=learning+styles+in+mathematics
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e591.bin
0dcb37f7cdf963e53a51bc9afa6a6bc8ac038652b3dab4c0e81566b6d56d097b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 16840 bytes
font_01_sfnt_off0001111f.bin
0d0570e3df67e9da876d1bb290029294d7cfc9a4bf330fb21c1c86c2dd4f0769
pdf-font-stream PDF embedded font (sfnt) at offset 0x1111F 10628 bytes
font_02_sfnt_off00012941.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12941 16792 bytes