Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac5845fe9213820…

MALICIOUS

PDF

64.6 KB Created: 2020-11-20 05:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d29e3a1551d8296a8bc5f363adbcfb87 SHA-1: bfc7ec7ade9ad2f07231528043e0662b9ae0aa02 SHA-256: eac5845fe92138201d9dcde41d29e5a9d94a7315ad1fb22c0622668657be6994
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=expresate+1+chapter+3+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fa790827cc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f91f22b126af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fb70c98c0b2c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/6dfe527e154aa4.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/6855556.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/jubiferekaka/89953612996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d10991b-0e4b-4143-ba55-28216412eb32/votobawi.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/1q84_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/23626456744.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_off0000bd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD84 5452 bytes
SHA-256: c0e39247dbdec0af6777ceb85ae522dc50115f460379837de4b4fcfb0eaf3f31
font_01_sfnt_off0000d014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD014 11896 bytes
SHA-256: c05a485655fdf6137817a43d74c66ae5c57ddf422ef1b5152014ed6834c6c058

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