Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52879f9daa264d8…

MALICIOUS

PDF

69.1 KB Created: 2020-12-18 12:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 28dd51630427d8b297e17364e27fef3b SHA-1: ec50a327769353c2633e6e854a9728b0e5d17536 SHA-256: d52879f9daa264d86b76e37a30dac2325cde07b285cae6701a05fcb94115588e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'trafffe.ru' was extracted, suggesting a redirection or download attempt. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URIs often imply the use of JavaScript for malicious actions like downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=old+age+homes+near+me PDF link annotation
    • https://pegebitejujag.weebly.com/uploads/1/3/4/4/134445458/dozexedivirizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f944c9f0041c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5fb9eec9f0a2a.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/gebijufojuvovo.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/bofewuseliwupogeb.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/fekaduvopigab/remogiwofopudigemipu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/gamejozab.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/jarokodijajurajewidarawub.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/fopasobotanusufozes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34481ea8-bfcd-44e4-81c6-f1dac868068d/south_african_border_war_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/31620606833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf82e14-8ba1-4cee-a8fd-c43a36501b51/cleveland_high_school_reseda_california_alumni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9718b87-e434-41dd-939e-b6cbcf3ba873/12180677730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc22fcf3-f2ef-453f-a637-ce70afce8dfb/zimutefasebixegewotowaru.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_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 5268 bytes
SHA-256: 528baeab4f53fc33aa4721ecad7b998a9be69ae05e62806c7d9e127fa7328bf5
font_01_sfnt_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 10884 bytes
SHA-256: e38ca3d793103e0fbe9ed5f8d64a49222594b628af2dd2d719d0d60569570e1a

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