Malicious PDF — malware analysis report

Static analysis result for SHA-256 4208a818e1bb387c…

MALICIOUS

PDF

85.1 KB Created: 2021-03-21 00:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e4fc364eb84b43cc39cdc28892ce5aa0 SHA-1: 2f72be63cdd024b6903788f7bd0e9d0896b9d732 SHA-256: 4208a818e1bb387c303e2377a8703f22371315e5c20629fbe1793b366c446971
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and an embedded URI pointing to 'https://pelibifir.ru/123?utm_term=arnold+schwarzenegger+meme+template'. The document body, though heavily obfuscated, contains text related to 'Arnold schwarzenegger meme template', suggesting a lure. ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further confirms malicious intent, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=arnold+schwarzenegger+meme+template PDF link annotation
    • https://cdn.sqhk.co/nodujugebi/h4P2ojg/steampunk_movies_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/gjA4idz/fozodovu.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/85baa79c.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/8658020.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/hiijgw2/49528645235.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/OtBbVgd/nakobozuxikozavekopupunol.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/fjcggjf/doctor_s_eye_care_columbia_sc.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/994883.pdfIn PDF document text
    • https://jaxapinaxet.weebly.com/uploads/1/3/1/4/131406361/e147696.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/jazofi/39309241754.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/spirit_fall_down_luther_barnes_sheet_music.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_73c1216998c74ceba8444a01c986b9fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punurum/bargaining_power_of_customers.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_1ec9db0d5f094d5ea59db7937aef5980.pdf?index=trueIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_e07d8ff991594832a9e716f250754df5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegugus/zezojakolanisero.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_0745a622c9c84a1c8b078bb46c4d76a5.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_bc7f4012248f4132a2dfa201ad76bfa9.pdf?index=trueIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_ca03cc0d9bf74d808136ff71d983a82d.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_e676d93540d84cb4b414b06029230616.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/wedadiburawevikakimu.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_a710e55db4c646078e84c0012a9ea8bf.pdf?index=trueIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_8731bbe7472540c096cb9b8b19b11798.pdf?index=trueIn 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_off00010bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD9 5620 bytes
SHA-256: 20ee4b502653b09691c2b0bcec3a6b4fd91e50807cb5c223b95fb6853e54f55e
font_01_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 11400 bytes
SHA-256: 63c153ad303f3a1aa807e89b89835fd8127c87a135867efa5451b885ed5588f4

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