Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0bf30282018dbb…

MALICIOUS

PDF

71.6 KB Created: 2021-03-01 01:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e39add0a9f5de049d9dc282f7527e4a6 SHA-1: a6756a2590ee882c670598c55942c127bd64e6a9 SHA-256: bc0bf30282018dbb59b049997c0776372299c956bf475f1a9995868a70a1bb57
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution vector, likely using T1566.001 (Spearphishing Attachment) as the initial access method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

Heuristics 4

  • 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
  • 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://vilenefex.ru/aws?utm_term=who+sings+for+simba+in+the+lion+king+2019 PDF link annotation
    • https://cdn.sqhk.co/gituridewo/jiGjjAc/zombie_hunter_king_mod_apk_download.pdfIn PDF document text
    • http://poguwukobewale.22web.org/tesla_model_3_price_news.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_600674007f7c7.pdfIn PDF document text
    • http://sanogisiwelel.iblogger.org/denorefegidagibopojixaro.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/bLViijj/emojination_3_emoji_game_answers.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/baron_de_montesquieu_the_spirit_of_laws_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_60253e0cd4f51.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/rexebawifufagijov.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/kurotewezifuvedafad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_6035df5fd214d.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/ghdievH/rizovopexuvafarodowijilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogufisuru.epizy.com/bototogowewifuxipibinu.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/indian_awards_and_honours.pdfIn PDF document text
    • http://fudinurozoxesa.rf.gd/93326801330.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_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 5668 bytes
SHA-256: 758cb3470e38540ba8052fc2091421ddbbfa23c822a0f521ce24077b53b3d594

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