Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a4b6f1c3c1b062…

MALICIOUS

PDF

75.9 KB Created: 2020-12-25 22:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bbeb8e1b8c8f4b57a966543d0d96ba00 SHA-1: 7103e81b8bb0b569dd2c1559481c40cb35cd50d8 SHA-256: 98a4b6f1c3c1b062990cbf6aeceff7f4364e0fadc267f6c49e7e363ef917c3df
104 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL, 'https://trafffe.ru/aws?utm_term=triggered+gif+template', which is likely the primary malicious payload delivery mechanism. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a false sense of urgency to prompt user interaction with the malicious link.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=triggered+gif+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f886794d1235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcd43355b8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_5fbadd7741629.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/wibedubosateg/jorakesudefadezovijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78a3ed2-6544-45e7-8771-a4ea9d4e9eee/vamusugebogeratabopago.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/lepavisukod.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/worksheetfunction_vba_average.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e45f2e-f632-4bf2-9a53-a2c9f07c6956/zeraketif.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/fetal_autopsy_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/bein_sports_2_australia_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd411373-a294-4469-9219-4d9a12ba9683/dnd_diplomat_s_pack.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_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5132 bytes
SHA-256: e4c48b7404e4bddc6d7c42df165468fbfea1950cf1725bb14451a8b583214fa9
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 11216 bytes
SHA-256: 2b3a1e07cb22846ff908c7f1f057a25312b3887e72744cb7250a56f8f4ec9058

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