Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c062bba6f800335…

MALICIOUS

PDF

77.1 KB Created: 2021-02-17 13:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 1e6ccec00b76e6763a9399ba4d3dd0d3 SHA-1: 8c0ed89923e6bca3cdbc41b8afae27fc90b9646a SHA-256: 6c062bba6f800335ed4c0c627e35c0420a743e240ac6df29bdebfbf1375bd68d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a URL that appears to be a phishing lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of external URIs and the link farm heuristic suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=what+can+i+use+instead+of+a+diaper+genie PDF link annotation
    • https://tidukunetubuf.weebly.com/uploads/1/3/2/7/132710673/nidiripuzon.pdfIn PDF document text
    • https://cdn.sqhk.co/zepaginu/UMITajj/movies_2019_action_list.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/wunuze.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/fcjdjgf/26550763908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fdb89a8d313f.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/6680076.pdfIn PDF document text
    • https://pelazokud.weebly.com/uploads/1/3/0/7/130775509/kaguditanofunusiwoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixulolefafela.rf.gd/video_cut_apkpure.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/gcse_chemistry_revision_worksheets.pdfIn PDF document text
    • http://wukefomirufiza.rf.gd/18897434194.pdfIn PDF document text
    • http://kitukogoxav.epizy.com/wedding_album_psd_templates_free.pdfIn PDF document text
    • http://tarinag.epizy.com/merrybet_agent_registration_form.pdfIn PDF document text
    • http://lenixad.epizy.com/62232780525.pdfIn PDF document text
    • http://mikesivu.rf.gd/madden_19_custom_cover_template.pdfIn PDF document text
    • http://janepalefudu.epizy.com/59667107038.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_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 5396 bytes
SHA-256: 517c904efe48a304c45aba19404646603775f4a827f49d87330d13b196a88608
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 11140 bytes
SHA-256: e0b218513bfd65695cdbd2fd302c04387f950eb481eb5be6d97a7fef91e2d148

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