Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d065e3e6fdb9c55…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 20:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7439d4879f2a1238b1f500ed3377e1fc SHA-1: ee3adc3313e38b707b03b1450dd9f55fe00159eb SHA-256: 7d065e3e6fdb9c557d78e08f9d50122f7d76893cb592aef3516b04680434b9d0
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a URL that appears to be part of a phishing or scam attempt, disguised as a search result for a common technical problem. The PDF structure itself also shows signs of manipulation, with duplicate object bodies.

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://jacksth.ru/strik?utm_term=laptop+charger+not+working+hp
    • https://cdn-cms.f-static.net/uploads/4526930/normal_601254473e960.pdf
    • https://cdn-cms.f-static.net/uploads/4460968/normal_6031f9d134029.pdf
    • https://felilediwifagid.weebly.com/uploads/1/3/1/4/131453780/765f79.pdf
    • https://cdn-cms.f-static.net/uploads/4413019/normal_602c402cb7711.pdf
    • https://nuwosalu.weebly.com/uploads/1/3/4/4/134497214/kadirabonomekesedi.pdf
    • http://hristogrigorov.com/red_hat_ansible_documentationl02h9.pdf
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/famomub-kelalevu-mevexijese.pdf
    • http://losinglotterynumbers.com/equation_aux_drive_partiellexi02o.pdf
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fca1a9ec5f19.pdf
    • http://kersita.fun/what_is_the_best_motto_to_remember_for_universal_precautionsdiz1d.pdf
    • http://jikovuruwigifan.iblogger.org/folsom_prison_blues_guitar_chords_for_beginners.pdf
    • http://socialwave.me/96693203412gd86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gorevifero.epizy.com/covalent_bond_questions_and_answers_gcse.pdf
    • http://zaxutakizet.epizy.com/60585011944.pdf
    • http://fokamosidiwu.rf.gd/97970567513.pdf
    • http://pimudovi.epizy.com/aashiqui_2_audio_songs_pagalworld_mp4.pdf
    • http://jokiperone.epizy.com/caller_information_c_5._0.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_off0000efdf.bin
16d256e7ad0376fb19878f9f32b5ffd4949d2b1043da61a1b79b324048fc832e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 5084 bytes
font_01_sfnt_off0001013d.bin
2ecaac69ca4e6e538468beba3ded0b344dca9bfc3fa5a1d37b8549f4b017c6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 11476 bytes

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