Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b40805c1ec533…

MALICIOUS

PDF

59.9 KB Created: 2020-12-10 13:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b371f3253ed173638681d5b137eb1808 SHA-1: 96fc27baa6a303cab1826da8e6cc92600f89fb64 SHA-256: fc0b40805c1ec53301ef8347a3ace86e5b497fd28f8a343670dc94b4bdc73010
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=sniper+assassin+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5fa4b83e4ac9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8d82b1b4337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f9a0558554b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fcd02ef6c07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f9aa6b01fe0e.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/difigomisosak/42868168604.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/learn_aramaic_language.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/internet_explorer_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/nofolovovegutewaxas.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/sharpe_s_tiger.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/king_platform_bed_with_drawers_underneath.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/alexa_bliss_and_buddy_murphy_still_together.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/48976136441.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/blender_2._8_video_editing_guide.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_off0000aea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA2 5372 bytes
SHA-256: dcb961cf50003d719bbbfa0fb4b65b887bf4017ed380e6fe93880a489437867c
font_01_sfnt_off0000c0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EA 10028 bytes
SHA-256: 9089ff84711567cc6a3ab8ef4765805ae35f56ada5a27311e8d1d899754d7372

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