Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ec73b9a185d47…

MALICIOUS

PDF

71.8 KB Created: 2021-02-23 19:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 52884714678511c38ce5b767dae46f52 SHA-1: 8963a2167e7bcc274cdb7ee7960a3993a498577d SHA-256: e65ec73b9a185d4744e8e63c61cc6dce6df768b5a5587723cbaa0982b0553c16
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, likely designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://baarspo.ru/strik?utm_term=lg+wm3470hva+service+manual PDF link annotation
    • http://kitusozuza.22web.org/du_2018_entrance_exam_answer_key.pdfIn PDF document text
    • http://lozutapezu.iblogger.org/59528914401.pdfIn PDF document text
    • http://iblack.space/13140285986vjl4p.pdfIn PDF document text
    • http://idealslim-ordina.site/nonizefopexp1qf0.pdfIn PDF document text
    • http://hook-up.fun/kagitawazit4h3on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_600b704f7731e.pdfIn PDF document text
    • http://jirekakeduvinij.22web.org/pet_sematary_1989_zelda.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/xerezutovidoruwobq0a0w.pdfIn PDF document text
    • http://webpost.pro/84885909806kgw7l.pdfIn PDF document text
    • http://subagibetuvipi.iblogger.org/bikini_body_recipe_guide_free.pdfIn PDF document text
    • http://italywow.info/how_to_fill_out_certificate_of_custodian_of_records1zr24.pdfIn PDF document text
    • http://satogolijosefas.iblogger.org/15300193554.pdfIn PDF document text
    • http://rabatil.22web.org/kundli_software_for_windows_7_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forolulazo.rf.gd/13790870662.pdfIn PDF document text
    • http://sukilik.epizy.com/68366657407.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/laminating_sheets_near_me.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/zorebudiwojuvep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5780 bytes
SHA-256: 8f065671db8ddaf88823e37b0f78c1c2039d03ff1ccc092caab0a9b666a893a6
font_01_sfnt_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 10676 bytes
SHA-256: 30de29e95a44b12e1acbfee0b0760a54e2b8914e9473d624d6a22c1307591f82

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