Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef33308ee94e8a4…

MALICIOUS

PDF

63.4 KB Created: 2021-02-21 00:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 55790d8b1c412017438337864a5fdfc2 SHA-1: c8147ed1223cad60047ba7cc65fe86848ab4eb99 SHA-256: cef33308ee94e8a4a56c37b4a81d28cd6772f0b843165cdd845b287de0b288b1
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/wix?keyword=cabrillo+college+crocker+theater+map PDF link annotation
    • https://cdn.sqhk.co/totafeta/2jighid/98508809704.pdfIn PDF document text
    • http://confirmationhelpcenter.com/pujetupizuragisoxitilamww83b.pdfIn PDF document text
    • http://bt-management.website/jigewisivusabizonipejepumdltjx.pdfIn PDF document text
    • http://sqrab.top/latabelukebojoxuv8hko.pdfIn PDF document text
    • http://vufilulojusabid.iblogger.org/google_chrome_linux_mint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_601e5055c20f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ff54160822ea.pdfIn PDF document text
    • http://vashobereg.com/2890757724585lbm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tutapivemaki.rf.gd/army_driving_test_answers.pdfIn PDF document text
    • http://jefofijoker.rf.gd/breakup_video_song_for_whatsapp.pdfIn PDF document text
    • http://laboluvimaniraf.epizy.com/18509114482.pdfIn PDF document text
    • http://fugewep.rf.gd/acetate_sheets_for_baking_ireland.pdfIn PDF document text
    • http://bamusob.rf.gd/gaturovidapo.pdfIn PDF document text
    • http://wiwazez.epizy.com/naleduvorixev.pdfIn PDF document text
    • http://kepinud.rf.gd/sherawali_mata_ji_ki_aarti.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_off0000bc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC12 5276 bytes
SHA-256: cd1deabeb2ce1dcce52d4d6e954554b8abfc8a6ab04cfa7be6fc98287aad719b
font_01_sfnt_off0000cdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD1 10152 bytes
SHA-256: 27d0b1d9ad1c4e4c7dccc542fe3dc4de597e9227d72885b7ffa5742dda013f49