Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9de688d6b98e3c…

MALICIOUS

PDF

73.4 KB Created: 2021-01-02 13:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 67929a04d64d75cb06f396fe20c40f0f SHA-1: 4c9e9ab14db0597a85d44b5634b4232565025880 SHA-256: 7a9de688d6b98e3c0a90f5b3119f99ddacabd38b928b01365aa5d8fa24756aa8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to malicious content, likely leveraging a PDF vulnerability or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=la+rams+injury+report+week+13 In PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/4727257.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/jihes4U/badap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5f98d1965e4e8.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/2tie2cp/free_woodworking_plans_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8a55875fe35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_5fc04edbba3da.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/pawiwedikad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87b0047d464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420470/normal_5fdd3ffd08504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/mountain_dulcimer_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/hire_purchase_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/lamination_sheet_roll_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/kenya_law_reports_criminal_procedure_code.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/53236942207.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5308 bytes
SHA-256: c5f0725c7105630e7e21d97216ca7fa49e5e9c86062f09132025eb433d906cab
font_01_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 10596 bytes
SHA-256: da5857a553c13e02fb302bf71192e59953704ed9f903b99fa61d73c4c09c506f
font_02_sfnt_off00010a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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