Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d7919420ea5750…

MALICIOUS

PDF

71.9 KB Created: 2021-02-20 23:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 67a6eca496ffd653aeb0c2830d8d4a82 SHA-1: f2fb6ce5aa54640d4c543d7fb709d404f83dbab4 SHA-256: 90d7919420ea57509bd0d5a0108f31a29fb4817d0d711069d80559e12253afa5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to boost search engine rankings. The primary URL, 'https://seumenha.ru/wix?keyword=torque+burnout+cheat+codes+ios', suggests a lure related to game cheat codes. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of a link farm and the malicious classification strongly indicate an intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=torque+burnout+cheat+codes+ios PDF link annotation
    • https://cdn.sqhk.co/mujexoxa/16s5fb1/23808771477.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/ichhiaI/wurukumimemamakaso.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/dBjjjhh/literacy_enriched_play_centers.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/k9Spie5/htr_plus_slot_car_simulation_pc.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/lexananexuripexot.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/wRhsZid/city_car_driving_mod_apk_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/rEgcx8l/lozajalavabavovojiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470687/normal_602d261cb41bd.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/1fljbhh/siwemozapigilukusuwud.pdfIn PDF document text
    • https://rabivavas.weebly.com/uploads/1/3/0/9/130969809/1200941.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/aidRifW/history_of_nigeria_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/jgcihhj/radijejukabawevobu.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/mjigfij/best_voice_recorder_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/m8Vyygh/joxugilutekufu.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/gHijhiR/39036152640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/16724582215.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/gunlance_guide_mhgu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC57 5212 bytes
SHA-256: e1ffa083f126cb031fd16d38277f17bf97f238abc4e7536dd4bc7e95fab1a2e5
font_01_sfnt_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 10580 bytes
SHA-256: b80576961c92a1d85acdcc0dcf413e77eb0d2e8fb7e0eaf78d55bb357a832885

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