Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fa12a7b9cfc4ea…

MALICIOUS

PDF

178.9 KB Created: 2021-06-25 16:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d2d962f93ac56bbc24a0d8d2191fdc0 SHA-1: 385727ec8f9b5a9f82b7e5f50342fdd0eecf45a2 SHA-256: 92fa12a7b9cfc4ea05211060d2ef1b8d2ba41e0ab2f4d4baad7ae3139dbff7f7
196 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of an advance-fee scam, luring victims with promises of prizes or funds requiring parcel delivery. Multiple URLs point to compromised CMS upload directories and link farms on disposable hosting, suggesting a distribution mechanism for phishing or malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://villatoscana-pi.it/userfiles/file/mewitarudimagufatozawutef.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608204f5a3442---12993786792.pdf
    • http://ciskmv.com/css/file/67735576517.pdf
    • https://prestinieurope.ch/userfiles/files/bijukasavuxajajipo.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afddbb310a6---ganakodamopododa.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092de96a210e---felabalod.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/33352182835.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d32af76b55---gaxemexu.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869b583ec0c---zopelokojajavukunafofilar.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/8c1c12ee914ac111b49d09724b6ec681/nikexabubebaxekorogopet.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b6p1fa55dqdv5g5e26g64897u7/43300262442.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/73bd032634b344a0cf8b82e1ec1a071b/94649554229.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081cc02c4c68---butolukakokimelapasizeguf.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ea17013160d3ff5c2b4211be6f31949b/78355426221.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b711e77823b---59487817447.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f60dc15a38---leworolexugomato.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=jesus+is+the+image+of+the+invisible+god
    • 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_off00024988.bin
b2a71e357827d55bc34c74d4350423397fc56709ee7d678ee54abc524b5fb934
pdf-font-stream PDF embedded font (sfnt) at offset 0x24988 30664 bytes
font_01_sfnt_off00028ba8.bin
1a62ead05ee420e806f15d44ed5589e2d4dcfa5333b4afe0ec75561445b467f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x28BA8 10996 bytes
font_02_sfnt_off0002a4e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4E1 16792 bytes