Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55cfd6b998eaa81…

MALICIOUS

PDF

70.7 KB Created: 2020-11-14 10:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb6c3183010a990ed427890b3040635 SHA-1: bb3e0e657aa99d99ef629ff3318268071cb5dcd8 SHA-256: f55cfd6b998eaa8133cdf7057bb3efb6376b98f301781d406340cd5994791dd3
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, including one pointing to a suspicious domain ('trafftec.ru') with a query parameter related to movie websites, suggesting a lure. The presence of embedded PDF link farms further supports a malicious intent, likely to redirect users to harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?utm_term=new+release+bollywood+movies++websites
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/gaset.pdf
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/6c1e1669e50.pdf
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/kezejine-wenerijupukimuf-vibatiramadugep.pdf
    • https://bofezukidev.weebly.com/uploads/1/3/4/4/134464138/04d7767adf.pdf
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/paximuruved.pdf
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/607dd81.pdf
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/bewajop-kedifuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/10062769519.pdf
    • https://s3.amazonaws.com/gizonukorad/lapevidagujajadegimelig.pdf
    • https://s3.amazonaws.com/xanebavifamopez/hp_15-f233wm_disassembly.pdf
    • https://uploads.strikinglycdn.com/files/6eef0a43-b045-482c-b1fd-49592451ce15/google_vanity_phone_numbers.pdf
    • https://s3.amazonaws.com/zerejibixupav/nusenaxufoxisuvufuf.pdf
    • https://s3.amazonaws.com/dorulusof/98257319440.pdf
    • https://s3.amazonaws.com/zokokamu/79931642484.pdf
    • https://s3.amazonaws.com/tipakalif/lunokexakajaduxobaxibojix.pdf
    • https://s3.amazonaws.com/tokit/76128790121.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6f0.bin
6de09f67eb7924870b5d93b12a302da3bb1e89b40eec41f8b41f8190ab14a5dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F0 5336 bytes
font_01_sfnt_off0000e918.bin
a33e9f4d559e5c03c14fe1f6565c19321bd9426f891c3eb8740201b1831feaab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 10744 bytes