Malicious PDF — malware analysis report

Static analysis result for SHA-256 596906fee51f078e…

MALICIOUS

PDF

83.4 KB Created: 2021-04-02 23:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6604a0265ece30781e0670870cff55b8 SHA-1: 4bca804388aabfb0e375aa1d513d8a8b93d32926 SHA-256: 596906fee51f078e7a7b35a00c8cd064d52dc183f619ebf195121b89af7b84e7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a product review, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=polk+magnifi+mini+5.1+review
    • http://josamaduxano.22web.org/wetisidesakosadalelif.pdf
    • https://cdn.sqhk.co/deloreba/Dheljih/29988405005.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_600fa3703d4e9.pdf
    • http://ag-management.space/descargar_un_puente_hacia_terabithia_castellano_1080pwdcvp.pdf
    • https://cdn.sqhk.co/xibidodoko/hhATCkH/mumelijalimukidinoviseru.pdf
    • http://tumbochka.space/4130659452u6f9d.pdf
    • https://cdn.sqhk.co/lisakopew/EWCVsjj/autoscout24_used_car_finder.pdf
    • https://cdn-cms.f-static.net/uploads/4499651/normal_601d1738782ae.pdf
    • https://cdn-cms.f-static.net/uploads/4465935/normal_605eebb90a4bb.pdf
    • https://cdn.sqhk.co/besuduxikuvo/jrGiggd/tippy_tippy_tip_toes_song.pdf
    • http://leadtop.co/80656410086jftob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vovabagubajegeb/nixepakatejefakuguwuta.pdf
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_56de2b152da74486b1e4c89278ecfd78.pdf?index=true
    • http://davupuvaf.rf.gd/bobafuxaxupit.pdf
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_4215a34749024bbfb1f89a4a7241d699.pdf?index=true
    • http://liwununigu.epizy.com/20783210401.pdf
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_390b88f167aa47d2993f0af96b0814d3.pdf?index=true
    • https://s3.amazonaws.com/veraxawewib/kexef.pdf
    • https://s3.amazonaws.com/wazotojemov/kabegivogipi.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb92.bin
6d303d2776d39a45acf140ab025cc79fdf2cccf06e4caf5289eeb106ab4da387
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5040 bytes
font_01_sfnt_off00010cb3.bin
5f486a5973b9378866495dbe9da994740c38fc40bc26ca170ff7cecc87599800
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB3 11012 bytes
font_02_sfnt_off00013229.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13229 4324 bytes