Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a90013b407cf736…

MALICIOUS

PDF

88.9 KB Created: 2021-02-26 15:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b81701dd54ab661ec70a6f48e89830ad SHA-1: 7523835db5eeb0423d0d444f08429fa1b2feedc9 SHA-256: 5a90013b407cf7366067339c5a8d6bae181bdae4ff1f13087b624c38e270f3ef
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'lozipotod.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a date, suggesting it may have been generated programmatically to disguise its malicious intent.

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://lozipotod.ru/strik?utm_term=hp+elitedesk+800+g1+power+supply+upgrade
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5ff5e0a0a1807.pdf
    • https://cdn.sqhk.co/dojatejij/JAb0ahi/dafajuxuxuberafudoxu.pdf
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fe9ed04ea4d2.pdf
    • https://cdn.sqhk.co/fenazijeguk/gege5hf/logo_quiz_level_214.pdf
    • http://lofajemami.sportsontheweb.net/norcold_rv_refrigerator_problems_solutions.pdf
    • https://cdn.sqhk.co/sovajepuxe/i8YUktD/ice_cream_cake_delivery_chicago.pdf
    • https://cdn.sqhk.co/bogovureg/dfZvkyl/pilot_flying_j_jobs_altoona_iowa.pdf
    • https://cdn.sqhk.co/guvevifowo/dwjsqjf/51837366221.pdf
    • https://cdn-cms.f-static.net/uploads/4487423/normal_60271ea2e2f51.pdf
    • https://cdn-cms.f-static.net/uploads/4483361/normal_602d82a781a95.pdf
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fdf0e8177d1f.pdf
    • http://gemubanabugawa.mypressonline.com/39592132907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vujapoguxesak.myartsonline.com/was_the_3rd_estate_started_french_revolution_and_wrote_1st_constitution.pdf
    • http://ropajevunowijit.epizy.com/73202743451.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_off00011ab4.bin
12f76041bf7077c2f0aeac92b0ec1ce22a35d88ad7b0a5b9bbc7240e73f12892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB4 5732 bytes
font_01_sfnt_off00012e65.bin
fe21d1ed8d78804d37899a555acbbddc758fdb8759403a9bd2781754022cc629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E65 11792 bytes

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