Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6caf29b21dc252…

MALICIOUS

PDF

67.9 KB Created: 2020-12-23 16:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f3bfb3da49d938a56af5f980995c1b61 SHA-1: 99e8684675732b3a747ff1e676210f4ce6fb8e21 SHA-256: be6caf29b21dc252aaa1b2531d7f41c632bb8c7a3eb86003516444787888c090
116 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a callback phishing phone lure, prompting the user to call a number in a context of billing, refund, or security. The embedded URL points to a suspicious domain, likely part of the phishing infrastructure.

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
  • 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) 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://trafftec.ru/aws?utm_term=formation+aide+familiale+cours+du+soir+hainaut PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5fc80b18a753d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_5fab39ef0d814.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/rgejihC/mujebijowufex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5fcccbe1681c6.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/jfWFAia/fifa_20_fut_team_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fcd346999265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_5faab5b4b6b05.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/napejaxosinages/bully_scholarship_edition_pc_apunkagames.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/diagramming_gerunds_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/pengertian_bioassay_guided_isolation.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/49342737019.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/nafexelivugonur.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/gifojaseveribosuvupi.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/fulimidam.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_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5216 bytes
SHA-256: 6e3e52b638ea54761cb3ae7bfc6f69ab671a8eda56a71058b108ab68669764c8
font_01_sfnt_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 12000 bytes
SHA-256: b456dfb2ab5060ffc11865bc5f69f596396a4d9cfaf9daaaa1e96ea5a72a1ec8

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