Malicious PDF — malware analysis report

Static analysis result for SHA-256 a316b7f0890782c7…

MALICIOUS

PDF

64.1 KB Created: 2020-12-07 06:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88521fed5b403cf37d530cc46f5a4d0a SHA-1: 4a18d8b9f610837db812b4a715c8690e3ff383b4 SHA-256: a316b7f0890782c7177a934b36b06505450097d5d79ec39dd11eaecf87400c2a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://cctraff.ru/123?utm_term=pathfinder+blood+of+the+coven+pdf'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector link suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=pathfinder+blood+of+the+coven+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444874/normal_5fc3cc003c6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_5fb60c8ab2cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5fbeaed2ba7a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fc5d8991f40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5f9b1a88bf1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_5faa139b432fa.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/xedewofuretujo/laptop_dell_latitude_7490_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/bohemian_rhapsody_piano_tutorial_sheet_music_boss.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/new_whatsapp_app_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/42903281903.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc50ab75147b14804d1b5f0/1606748856854/power_efficiency_guide_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585215687f52b6ba07531/t/5fc862b813de6e798159171c/1606967994513/ixl_9th_grade_language_arts_answers.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_off0000bdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCB 5268 bytes
SHA-256: 3aeab0dd76c7fb82b5e238d6f553d5618f18f879c1600ea55a6d5d62867aa5a4
font_01_sfnt_off0000cfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB7 10540 bytes
SHA-256: 558261e25a7ce3b0298395bd2d16491a43e1842595e555e59c3d8b0444d97fa4

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