Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec0fd09b53485fb…

MALICIOUS

PDF

80.4 KB Created: 2021-02-26 09:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9409ee2fbf50d893ce73b67699eff918 SHA-1: 81a7feeb48aadcad89b434df6d0909e06b5580be SHA-256: cec0fd09b53485fbd26daebb9128bc358b4bc1389111113b270f8dc85fa4145b
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 URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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://leonvi.ru/award?keyword=marvel+comics+december+2020+solicitations+cbr PDF link annotation
    • http://sejupifoz.iblogger.org/zinumuzawof.pdfIn PDF document text
    • http://gasorutika.iblogger.org/99978950017.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/59788206236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zamoguwudegovo.rf.gd/dagax.pdfIn PDF document text
    • http://gutumafik.epizy.com/ganapati_atharvashirsha_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/60272219171.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/83313280685.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/increase_80_by_20_percentage_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/bitumen_sheet_supplier_in_singapore.pdfIn PDF document text
    • http://vugokaduliro.rf.gd/arthritis_research_knee_exercises.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_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 5564 bytes
SHA-256: e43a6895e472e8716f6e3a77035d92eab1328ce35eca61e997b9155959b65124

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