Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b67678ce442947…

MALICIOUS

PDF

71.3 KB Created: 2021-01-15 04:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1f5e5f054084245ab5cc4fcf46ac5cac SHA-1: 2bc363f3c70b2c089fe85804485a9ec2b51d5e9a SHA-256: 17b67678ce442947b358bd123c50451a9d401c57d5af6d2b4ad145c60ae637b3
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 'traffmen.ru'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to exploit the user via a link, aligning with spearphishing tactics.

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=capacity+to+contract+pdf In PDF document text
    • https://site-1168265.mozfiles.com/files/1168265/7855076791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5ff7a54fe2d99.pdfIn PDF document text
    • https://site-1177587.mozfiles.com/files/1177587/racing_motorcycles_for_sale_in_kenya.pdfIn PDF document text
    • https://site-1178687.mozfiles.com/files/1178687/53870938768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_6000c27587992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5ff1e63a20df2.pdfIn PDF document text
    • https://site-1180454.mozfiles.com/files/1180454/pictoword_level_43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_5f9bdfac9c846.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/mesixadelomomo/baby_cat_photos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/apple_carplay_and_android_auto_dongle.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/joolz_pram_sheets.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_off0000d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 4948 bytes
SHA-256: cfe2d98965e1bfae72412050f8d101fa13f05ed70a20c1077e0ba29a6ce75bba
font_01_sfnt_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 11516 bytes
SHA-256: 72e9b6f11630e1802f6cc6d694307956280f05db8a9e7c128288d9313fc01456

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