Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83fbb8709f79b9c…

MALICIOUS

PDF

79.3 KB Created: 2021-04-10 10:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac72439a154635fca048e40836181f76 SHA-1: bd03338837e7845539e57dcc54d684e72c9991bf SHA-256: a83fbb8709f79b9cdb01337d0370db3c7ccbf961f9efe408c324a787d231d08b
136 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating an advance-fee scam lure, specifically mentioning a car accident settlement. It embeds external URIs, with the primary malicious URL being https://vilenefex.ru/strik. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=suing+for+emotional+distress+after+car+accident
    • https://cdn.sqhk.co/dodiniwotud/ggjhpgf/ninja_fighter_full_movie.pdf
    • http://boxberry-24.cc/golagivekirejal0yy5.pdf
    • http://verification-help.com/ejercicios_resueltos_sobre_el_principio_de_pascalej3hm.pdf
    • http://masajsalonunuz.com/nafemulesiodgtb.pdf
    • https://cdn.sqhk.co/putizimetiwe/jbIjfCG/38286290882.pdf
    • https://cdn.sqhk.co/dinigivo/idt1Ggh/remixes_roblox_id.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loxopudizus/97155244660.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/lol_guide_jax_top.pdf
    • https://s3.amazonaws.com/sojaxub/birthday_nimantran_patrika_marathi_format.pdf
    • https://s3.amazonaws.com/bomifabipi/fake_cheque_template_uk.pdf
    • https://s3.amazonaws.com/muvemasoxaji/78687720099.pdf
    • http://jelajasubilulup.rf.gd/welodosakanireb.pdf
    • https://s3.amazonaws.com/zarusegibitumet/34714955274.pdf
    • https://s3.amazonaws.com/musokejixami/principles_of_economics_mankiw_7th_edition_powerpoint.pdf
    • https://s3.amazonaws.com/pegebunov/php_interview_questions_and_answers_javatpoint.pdf
    • https://s3.amazonaws.com/laginekux/64080937869.pdf
    • https://s3.amazonaws.com/najipavez/how_to_prove_congruence_modulo.pdf
    • https://s3.amazonaws.com/setigafat/pobixatum.pdf
    • http://baminitase.epizy.com/semi_annual_report_definition.pdf
    • http://pusevim.epizy.com/pepomokunusimotuwesi.pdf
    • https://s3.amazonaws.com/vavale/dikalodizikapufemubalib.pdf
    • https://s3.amazonaws.com/venunamazozuzo/tavasubenam.pdf
    • https://s3.amazonaws.com/dosalapasenow/words_that_start_with_semi_and_meanings.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88f.bin
e6f01f2c36857997b5e9168ea2ae83bbf8452936c37ee5fecf254dd59c637510		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 5444 bytes
font_01_sfnt_off00010afb.bin
3a157b0d26e6c6e730301b5b5cd56b274774cc082e395209b8cb141a8d81b6f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 10824 bytes

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