Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c631928802c338a…

MALICIOUS

PDF

67.9 KB Created: 2020-11-24 03:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 77a8b40acceb59e5975bdbb809d2b7e1 SHA-1: 237fca89487136d37a18699effdaf16b857fb8f8 SHA-256: 5c631928802c338aff3c9923a32c27cb5209931dfb99390f4a80a3a0be2256ed
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a malicious download lure. The presence of a 'download button' heuristic further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/strik?utm_term=glary+utilities+trial+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3608d20-62d5-426d-ba28-d4c9439468f7/24621430616.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/gb_whatsapp_v_7._20.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/2017_acura_tlx_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/work_worksheet_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/keboluniti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb9eec6-c110-4aad-a74e-594e4f63cb00/download_lil_wayne_tha_carter_3.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/pilujale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c943df-5f4f-401b-913c-b92077a44fc5/bewilutusanag.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/assignment_504_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/53869113382.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/36160495008.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/futolofamuposoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/makupudiwal.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/34937379654.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/80144828472.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_off0000cbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 5044 bytes
SHA-256: ae159f639332faddb1720cb53720927a16564e84aa71534e2a78a23714722232
font_01_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 11124 bytes
SHA-256: 87d6a6cfa0af2b559555ea5d07eeec7acb65a70f80328b17ad826230e9002cad

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