Malicious PDF — malware analysis report

Static analysis result for SHA-256 9305cee5004c356c…

MALICIOUS

PDF

70.5 KB Created: 2020-12-23 22:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b381945b633321c60b1b5cfcc11c44c9 SHA-1: 7194d4711bb67eabc7564ef9c8e5d2f2e6c72478 SHA-256: 9305cee5004c356ce846d696db82dde52e369783dbe73fe7d9d42292e81f7130
96 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 URI pointing to 'traffset.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to a 'bridge card game simulator'. No scripts were extracted, but the presence of external URIs in PDFs often indicates attempts to download further payloads or redirect users to phishing sites.

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://traffset.ru/strik?utm_term=bridge+card+game+simulator PDF link annotation
    • https://tusunupo.weebly.com/uploads/1/3/4/5/134507020/29c8fabb493cbf.pdfIn PDF document text
    • https://kajurizekevebok.weebly.com/uploads/1/3/4/5/134586758/ecc16bbf01d18.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/2483374.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/hfXjagi/zong_ramzan_free_internet_offer_2020.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/585189.pdfIn PDF document text
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/5804106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/dajida.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/electromagnetic_spectrum_chart_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/gobifomutiramonidem.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/50049521183.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/diagnostico_organizacional_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/teacher_interview_questions_and_answers_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAE 5084 bytes
SHA-256: 21cc87183d278bd359fd9c4266363b2fd43d8f8ceba7e1884094ec9ca8ef7711
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10372 bytes
SHA-256: 8d663d3554dfb20d3f480f1dd01a86a2fdd82d45a1de86a6683363239b2ab0cc
font_02_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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