Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dbfa6a2432695a…

MALICIOUS

PDF

72.5 KB Created: 2021-03-02 10:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a2636668a983bd984200e3977e9a6f5f SHA-1: 5a115fde13bb007b239f83801e5c4eaeae1a0386 SHA-256: a8dbfa6a2432695adbb5d588bc77ecdc9c0cda433456acf5cf186c31d731147a
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://ponafet.ru/award?keyword=verizon+fios+quantum+gateway+router+manual', which is likely a phishing lure disguised as a router manual. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/award?keyword=verizon+fios+quantum+gateway+router+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fe50de8361d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fd8ffcf9e250.pdfIn PDF document text
    • https://cdn.sqhk.co/gorubabor/gia5gex/96710616761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_60329ff748d58.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/jfAidgg/93201800499.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/ntn_bearing_housing_catalogue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6027de965f94c.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/muvarelo/59508745112.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/54858933692.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/64902383710.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/autodesk_inventor_vault.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/bajaj_allianz_car_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/resume_templates_for_software_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/how_to_write_a_personal_statement_for_masters_application.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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5420 bytes
SHA-256: f1b6280740d7e163b9b12e43db5689b0e352ab43ad51ca8bcc4ceb854e6eaba3
font_01_sfnt_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 10240 bytes
SHA-256: 30d7a8c482f7fc8ca6c79ee74552b0175f81707aa79c12226323d4ca059155f6

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