Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6613c9fc95adfd…

MALICIOUS

PDF

73.2 KB Created: 2021-01-15 05:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7d933c242bea4ee209097e851eaf260f SHA-1: 9230696c1834af3cd86eb5a419bc07d7dc5ea460 SHA-256: cf6613c9fc95adfd27d20ca5f9a476b321b57ed28a888f73e35f8d41300c6c4d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of an external URI pointing to 'traffking.ru' and the 'SE_INVOICE_LURE' heuristic suggest a phishing or scam attempt. The document is likely designed to exploit vulnerabilities within PDF viewers, leading to the execution of malicious code, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'unknown_exploit_score' findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aws?utm_term=filemaker+invoice+template PDF link annotation
    • https://site-1171990.mozfiles.com/files/1171990/91205973508.pdfIn PDF document text
    • https://site-1171661.mozfiles.com/files/1171661/kikumadanu.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/32466035214.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/zovezibobelixe-temodito-migozoxivow.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/WjfWZhP/super_soccer_champs_2013_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hjmjyUg/free_app_to_make_music_video_with_pictures.pdfIn PDF document text
    • https://vamabeloketofip.weebly.com/uploads/1/3/4/3/134344852/2192846.pdfIn PDF document text
    • https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/3146686.pdfIn PDF document text
    • https://vaxovuxaso.weebly.com/uploads/1/3/3/9/133997441/373242cdc.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/sevoga/100_gr_en_ml.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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 4980 bytes
SHA-256: 834581b27c143de9ea6560368833965f5efb9da9f0c7f2b04088d934ce907f72
font_01_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 11132 bytes
SHA-256: ac318b4383bebc588b5384f428804f6779376334f00e1b546d9e9692b944e610

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