Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae9dc95a0450809…

MALICIOUS

PDF

67.6 KB Created: 2021-02-18 04:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8036ac212da4c40509a45c6f55dae99c SHA-1: 1cf585e0ad210d5669f83cf7232c36313dc40fd2 SHA-256: 6ae9dc95a04508095a80aefbe2f2d209e4fd41fb22ab5e63e728297220dd2436
124 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm designed to redirect users to potentially harmful content. The embedded URLs and the document's structure suggest an attempt to trick users into downloading software, possibly malware, by impersonating a legitimate free trial. No scripts were extracted, but the presence of numerous external links on disposable domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8336

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://leonvi.ru/aws?utm_term=nuance+power+pdf+standard+free+trial PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5fe1d26440e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5fd355e766d34.pdfIn PDF document text
    • http://sagokorize.22web.org/98103120776.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_6008aa2ac6f87.pdfIn PDF document text
    • https://kalaxokesipak.weebly.com/uploads/1/3/4/8/134888683/9391988.pdfIn PDF document text
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/kapameponojuv_gawawe.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/turbo_manager_app_for_android.pdfIn PDF document text
    • https://tetalopen.weebly.com/uploads/1/3/1/8/131857308/3b05fa0fdde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5fdab7fa34647.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/187051.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fedf28ecd291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5feea509ea486.pdfIn PDF document text
    • https://kumeboxisadinur.weebly.com/uploads/1/3/4/6/134684257/336210.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/fjd27gi/67679545574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisemukoninu.rf.gd/bondhu_tor_laiga_re_song_free.pdfIn PDF document text
    • http://vosivoru.epizy.com/hink_pinks_level_c_answers.pdfIn PDF document text
    • http://refufigatuzar.epizy.com/9431449323.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 5208 bytes
SHA-256: 580f2811c9ca25de456c78c6425633fffca0cdad6c6e2846429c9b2e23854b6b