Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9ed6acc17f7254…

MALICIOUS

PDF

67.9 KB Created: 2021-03-29 16:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7e6af390777f62aa9a37311b41ba1a7c SHA-1: 383fd3873bf21fb27fc1211d9a8e00f28d368d26 SHA-256: 5e9ed6acc17f7254c5f353f622f00da5ca0011882291c4c527c9c3bcedbe03a3
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a "mustang assembly manual pdf" lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

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://bologen.ru/award?keyword=mustang+assembly+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5fcf38fbe17eb.pdfIn PDF document text
    • http://mklhhhh.space/gonizulefurejewino6z9ts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_6059ce886739a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_6011b63ba1f7a.pdfIn PDF document text
    • http://sumodena.getenjoyment.net/yesterday_beatles_chords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fca2460b9d07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_6005a7f139b1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_602886915d5e4.pdfIn PDF document text
    • http://richmaya.site/yamaha_rx-v377_specse4kgc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff50dc6ad4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_600a1737b2219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_5fd96d472752c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc919697d0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_60145d2ac098a.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/piwisitomebaneno.pdfIn PDF document text
    • http://douchehq.xyz/patton_heater_puh680_not_workingbuwg5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sejakopa/60355811586.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/commando_2_full_movie_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/66015500485.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_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 5512 bytes
SHA-256: c3657e6cb403ac3b02e179a9b60f29294c0c6bdb80270f85452a6e238ab2c2b0

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