Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2ca2ceb5d395ae…

MALICIOUS

PDF

68.5 KB Created: 2020-12-15 03:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2888238d5e683ebcfb1f081d07838839 SHA-1: 3a7d369bed1d6aaed99fe96cb81fb9e49e266e6d SHA-256: fa2ca2ceb5d395ae71037cb7fe3dfeb5b84876e2892f54e62223d458acd0f2ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host numerous external links, with one identified as 'https://trafffe.ru/aws?utm_term=big+pun+capital+punishment+album'. This pattern is often used to distribute malware or facilitate phishing campaigns. No scripts were extracted, but the presence of external links and the SEO link farm heuristic strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=big+pun+capital+punishment+album PDF link annotation
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/9456480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_5fd810e5ca31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fa5742eb2fb8.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/minoxaxotesinugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc52d115687f52b6b9d10b9/t/5fc7a50e6beae454316ce8e2/1606919441109/tank_for_sale_usa_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/vijivisexemapogo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe119618e72e5fdb9e8b57/1606291862961/32046475764.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dcbf16f6d44b07e099ec/t/5fd1c534871f8c6e595c6157/1607583028193/teacher_classroom_fun_play_preschool_learning_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e878c0-350d-4d43-b930-bb3d64564641/ultimate_skin_installer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecedbf71053ccb1052a5/t/5fc5361461e25426e1e0d12d/1606759956188/properties_of_matter_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/definition_of_physical_bullying.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_off0000cdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 5440 bytes
SHA-256: 19d5e5398a82d08b5be85cf6d75eee6a36a0b4a1a45ec8a845d48bb0e97ab26a
font_01_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 10904 bytes
SHA-256: bc89d5521ad0917d1dfedd09f12f7717c6f8b6aa3b2346c58d2ad16e46ef2632

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