Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d482e76c0181071…

MALICIOUS

PDF

72.3 KB Created: 2020-12-25 09:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5039bee8639c3da41fe8a4134ec8a04a SHA-1: 8d14cc77c770e70595af024bdd9ac8e8751dd691 SHA-256: 9d482e76c01810717c4ae06f53075a91d46d0a4e859e31c11c10f02dbc856a64
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=versatile+tractor+dealers'. This indicates the document's primary purpose is to lure users to a potentially malicious website. The ML classifier and ClamAV also flagged this PDF as malicious, supporting its role in phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=versatile+tractor+dealers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f92af34bf0ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484635/normal_5fe1976064aa6.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/LibdicC/soxeribibirarodiguvamujar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365652/normal_5fe171a3c923c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_5fd1e79b4688b.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/Agcjeig/bar_trivia_iowa_city.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/1t8axic/1989585981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5fe1035867769.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/jdigigc/pc_building_simulator_3dmark_score_calculator_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fa76ea3c6df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_5fc29884b0747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f96195473800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_5fc351ee60f82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e0b835-66e1-4cb8-81c6-fb9c92a10892/mac_miller_knock_knock_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90530f18-e923-4bd7-b1d6-df13fb00c7a5/17216949733.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_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 4900 bytes
SHA-256: fbb0f5138c3c36579adf841d1310a5a2f100445ebe9736b150b9921a53760c96
font_01_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 13092 bytes
SHA-256: 6ad17527813c9982d7465e4621631d617055883164b478286b5fff39eb311d5c

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