Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e1fcb8d1cb7864…

MALICIOUS

PDF

79.0 KB Created: 2021-01-18 21:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1b433e6454b76be84906ca6829087122 SHA-1: 9e896def0c72cb6101448237fea5a93517af329c SHA-256: a5e1fcb8d1cb78647ccb5feed95052afc6645446e41b23080f9deb62e0d73491
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, specifically pointing to 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL suggests an attempt to phish or redirect the user to a malicious site, likely delivered as a spearphishing attachment.

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://traffking.ru/123?utm_term=wolfgang+puck+mixing+bowls+sam%2527s+club In PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5fcc2e68bffd6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/jgWFrha/xuporimef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5f8d9afd18c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452837/normal_5fba919946b15.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hiBgf4G/bejeweled_blitz_cheat_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/iaFBjg6/seven_deadly_sins_grand_cross_jp_download_ios.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/filidabut/92209823694.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/jukunaworoluxexisis.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/b_v_ramana_engineering_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/age_of_empires_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/allah_pak_ke_99_naam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C4 5648 bytes
SHA-256: ec0fbc974382be3a5d90e9b228ecf5bbd4b4147e9f581bb5c1c205ae838666ae
font_01_sfnt_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 16164 bytes
SHA-256: 678f7f49c8ce6a44253c4c01f5ce2cb3a2b70df0cd652b2ca4790ebe8c87614f
font_02_sfnt_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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