Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eec12598506dd63…

MALICIOUS

PDF

69.4 KB Created: 2021-02-19 12:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf1303bece1bfd436b5b2deabd32a116 SHA-1: 23e8d76c4796003ae44a3999e6565d78d6c29815 SHA-256: 2eec12598506dd6383f42ed36b5311b91b994cb0bf981f5f25fa8b4c7cf877f1
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of urgency lures suggests a phishing or scam attempt, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/strik?utm_term=honda+rancher+350+carburetor PDF link annotation
    • http://alex-travel.moscow/tiwajerajaxarnrvkf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_6022c23226a7c.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/hhahjla/caption_for_wedding_pics_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/eP9jdjf/puppet_soccer_striker_football_star_kicks.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hciehiH/super_ninja_virginia_beach_coupons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5ffe272fcd2fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_602c4ebf8a857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6022270d6c3bc.pdfIn PDF document text
    • http://rofavaxob.iblogger.org/kasitedovaxusurowoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetoluwe.epizy.com/babington_academy_ofsted_report.pdfIn PDF document text
    • http://sexililelaweru.rf.gd/foursquare_gospel_church_reporting_portal.pdfIn PDF document text
    • http://tepaduvofevog.rf.gd/el_libro_de_los_muertos_egipcio_caracteristicas.pdfIn PDF document text
    • http://wubezitapafa.epizy.com/90951688767.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_off0000d210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 5348 bytes
SHA-256: 03c8938fa3453842a7f912fdcd94d7063147dca9f145b9ba8ccf397cf3cd68a3
font_01_sfnt_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 10776 bytes
SHA-256: e7b16edb24728128377b8da5cdff058b4ebfe4dd5d053406df697415a0ad22c7

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