Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dc10050056ef30…

MALICIOUS

PDF

70.4 KB Created: 2021-01-01 07:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a245f05d1168372065283cfd5e97eba3 SHA-1: 92e3fcad61c0d7db00ee45113a9133a9ad7e9fa8 SHA-256: 69dc10050056ef30355d87431e50478e11d4ecaa6926314b7a082cbdd9418227
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, directing users to potentially malicious content. The embedded URLs suggest an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://traffset.ru/strik?utm_term=dance+music+70s+80s+90s PDF link annotation
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/2750920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5feb72d60e24b.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/jb2JTih/86707182114.pdfIn PDF document text
    • https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/nizaner.pdfIn PDF document text
    • https://keberalu.weebly.com/uploads/1/3/4/7/134725283/b6e6ab488.pdfIn PDF document text
    • https://cdn.sqhk.co/wawerugile/gjl6zgi/befuwofizuza.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/8980435.pdfIn PDF document text
    • https://duwelebizan.weebly.com/uploads/1/3/4/7/134701088/kerekizor.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/2pjhiae/wuxuvupozoke.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/5403542.pdfIn PDF document text
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/4707079.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/a25202ae7c98d40.pdfIn PDF document text
    • https://gimunoje.weebly.com/uploads/1/3/4/3/134344093/lawikagiraxi_xadepiremepan_binifusexuxog_tawot.pdfIn PDF document text
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/kubemenolulave_basebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 5388 bytes
SHA-256: 257311c81155ac0c2ffb61acbfcb9962fd707e3a27b4b0c17ac71d123afe1a05
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 10672 bytes
SHA-256: 253f09d2c385d938069116c73657f5da860dfbd6e4881ccdf4ac9152b576f49e

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