Malicious PDF — malware analysis report

Static analysis result for SHA-256 6684d7b461d51dd3…

MALICIOUS

PDF

67.5 KB Created: 2020-12-22 23:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: abd35c5c099c1f71ea098b49fe39fe2a SHA-1: b62729ca5052b9d6d459ca4a4f4fac9befc9fb90 SHA-256: 6684d7b461d51dd39c97c8b96ed10b354965cd6eeb0ee8742f6baa8da1e2dc73
116 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffe.ru', which is likely the primary lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafffe.ru/strik?utm_term=yepzon+freedom+personal+safety+alarm+with+gps+locator PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudefem/algebra_1b_semester_exam_review_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28709affbf90a66f4d793/t/5fca4863d7c3040d873de572/1607092324245/kunuxenisudorunugusesuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65710085bf90c0e2241e5/t/5fccac1705ddc9599d1d8068/1607248920610/guidebook_definition_in_literature_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7b6f43483e57e2cf12c2/t/5fdd0f974424484a2e20aee7/1608322970712/79225314764.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/xakadoburumelaveluna.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/wimomorigufajuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/notabitekub.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/bahubali_2_movie_video_3gp.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fd113f8dcf0f943ffb1232c/1607537657129/hello_neighbor_walkthrough_act_2_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/will_airbag_light_fail_inspection_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/azure_devops_documentation.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/36772315131.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_off0000c758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC758 5776 bytes
SHA-256: cdb9235891fec22e43ee62d6595124d4e1bebb4c9638dfa483d77c3a20c30cdb
font_01_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 11224 bytes
SHA-256: 3ce80a8cfdb105b5d5ad384387fd88b77520d4bb7f01c31efb2fb96b27a44c69

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