Malicious PDF — malware analysis report

Static analysis result for SHA-256 491259a3e74553e8…

MALICIOUS

PDF

70.6 KB Created: 2021-01-03 05:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b4a0a1e48a120a2a34d0d13801de9e2 SHA-1: bde11bfa11ddafee8a6518e4e17f582bac62e0e3 SHA-256: 491259a3e74553e8d3a7d669e6218d7637af584a4ceeb9abff64bd1d49eb32a0
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/123?utm_term=mighty+bite+as+seen+on+tv'. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL in a PDF document strongly suggests a phishing or malware delivery attempt.

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/123?utm_term=mighty+bite+as+seen+on+tv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fdc8122be62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5f9e20e19b0a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f9186172b9dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5f96188fc5245.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/bufexa/demonologist_drain_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/real_chess_3d_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/wivusedaxazobalesixiwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/dijivaretuluwugibaleku.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/53193328062.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/dezaviw.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/lixigudip.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bupowozafelusaraxijo.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/blender_animation_nodes_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/42484458740.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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 5124 bytes
SHA-256: 3338f162ffebc061121dcdcca12a78fe88ebccd40bfc5f0cae99b459839eec47
font_01_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 10368 bytes
SHA-256: 41c7fc5e37d56e18634f922da76d31a9c06778ac01c936247bf9301d15574148

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