Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5b417bcd7c10c8…

MALICIOUS

PDF

52.6 KB Created: 2020-11-18 12:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9439392cd1dbae32d0cd46d5a62ffc1 SHA-1: 5d591df425e0f67f99324c6e12fff6cec3af96e7 SHA-256: 2b5b417bcd7c10c80423cc691fed0df46ca5fc3929c3bda5bd30285d6dd4f34f
124 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8393

Heuristics 4

  • 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 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
  • 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=racv+caravan+insurance+pdf
    • https://pokumajapemen.weebly.com/uploads/1/3/4/4/134490217/wubegiwunido.pdf
    • https://pesodubebugi.weebly.com/uploads/1/3/4/2/134234841/4571415.pdf
    • https://disavapiviloma.weebly.com/uploads/1/3/4/3/134351159/4535744.pdf
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/juwupetivu-mupigumula.pdf
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/9570453.pdf
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/rubad.pdf
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/xezomomob-sesuwuriz-judesopagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitatotol/contractor_service_agreement_template.pdf
    • https://uploads.strikinglycdn.com/files/3396afc2-c133-4ce8-8cee-bbf92f5665ae/luvuponidijezuwivub.pdf
    • https://uploads.strikinglycdn.com/files/c51ad947-61bb-408c-9e87-29ae2a6c3bf9/rush_hour_2_full_movie_english_2001_free.pdf
    • https://s3.amazonaws.com/liguwubore/bear_creek_reservoir_fishing_report_2018.pdf
    • https://uploads.strikinglycdn.com/files/51c0c83e-95a9-41b9-b53a-34a99fdc5300/ionic_bonding_worksheet.pdf
    • https://s3.amazonaws.com/tawosutosuxi/tnt_appliance_repair_lawrenceville_ga.pdf
    • https://s3.amazonaws.com/ruletetunima/widuvukakefeji.pdf
    • https://uploads.strikinglycdn.com/files/6a5b025b-5f90-4912-a137-085a3691a448/92805413302.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c54d.bin
2c5f785deca343f2d9bfc3883e8efa73999c5c7f1e5f3bf53f50b16f145d474e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC54D 5184 bytes

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