Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ceb9d623d4e26ce…

MALICIOUS

PDF

76.7 KB Created: 2021-09-06 08:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e20bbaeeff0162379d6601758783db61 SHA-1: 34a9ea29214b261c7014f6953a563d168d362c47 SHA-256: 6ceb9d623d4e26ce31f27553e8b71b56652c2fd67c087fa5e3fdb0137a816bb3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it is an advance-fee scam lure, likely attempting to trick the user with lottery or parcel delivery-related content. The document contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/l2ud4judh8v5sj0fbbchsukeg5/roxikasedo.pdf
    • http://dok-vo.ru/userfiles/file/19340297919.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62731d8d36---10162325798.pdf
    • https://muachungbaohiem.com/uploads/userfiles/file/funakilewuf.pdf
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/mekurozuzowi.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16091cff120edf---metefotivarijese.pdf
    • https://matrainagycsalados.hu/userfiles/file/9522603048.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1p4iuuq4li64gjv0nq88kv61fd/46048572766.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/6d28f69f43ea7d7057b1d08bccca08cd/23256757419.pdf
    • http://pagyesa.org/userfiles/file/20210808001113.pdf
    • https://gestcargo.com/uploadfiles/file/figexijiwov.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/figuworan.pdf
    • http://fairway.cc/images/blog//file/pasedik.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/a92dfe62118af9c915900ad48b6f0f5b/86536747469.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d354c4410---27639403312.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2f005e047---fasesobori.pdf
    • http://hiredriver.com/uploads/assets/files/vipafusutudenev.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/264829afa1c8c3851c88949fef1d83a5/78700222283.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/60cl1bttqeebom39gf8sca3434/90400263773.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1610ba9d7ef028---91395851818.pdf
    • http://www.toptehnik.si/images/ludetala.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/eck9l4ktfij44jgj00i1eum2dk/wobel.pdf
    • http://seamacros.com/upload/file/26827713481.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=chromosome+and+karyotype+worksheet+answers
    • 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_off0000c90e.bin
173354656a2cdeb6e4503da2e95825bb6800ca27c69c3cfd0ecf55bfd2f67748
pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 10840 bytes
font_01_sfnt_off0000e206.bin
801d5070f5f1d3c85e8e72c7e058154acaf3e52b4c997916d2b534111cf9f5d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 16440 bytes
font_02_sfnt_off00010cc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 16792 bytes