Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ead54da280bd9b…

MALICIOUS

PDF

69.8 KB Created: 2021-01-10 19:34:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3ec13c3eec7366165fb7f9ebddef9678 SHA-1: e28b2ea1e6667d8b2cbec1b82ba54373a5db7b0d SHA-256: d0ead54da280bd9bf296a333d1d75a2d2cd6023e309330b989edda89b923d7df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'traffset.ru', which is highly suspicious. The document body is heavily obfuscated and appears to be junk data, but the presence of the external URI suggests a phishing or malware distribution attempt.

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://traffset.ru/123?utm_term=jamie+oliver+cookbook+veg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fa10cc5dcac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5fa4fd96307f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486765/normal_5fedaa7856db0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8f398e7195b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fce4d31de8d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5fd36a997b878.pdfIn PDF document text
    • https://site-1174809.mozfiles.com/files/1174809/rec_screen_recorder_ipad_with_audio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fbf10779f5ef.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/bjbgdEK/nogavasiwozaduko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5fe8e105ea256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5fb2c846a5f65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5ff3372581450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f8a015e05e36.pdfIn PDF document text
    • https://site-1172743.mozfiles.com/files/1172743/cell_membrane_transport_lab_report_discussion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_5fd9953f92032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_5faf0f71ba23c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 5192 bytes
SHA-256: c000a1ea47e79dd3658d9f40c48a9e8920412d8213dce34c1969946b19999b2a
font_01_sfnt_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 10696 bytes
SHA-256: 86f5ab27ed9f769c51657b574d8abab5ba3c35f6fceb533f2cb0e10450139b65

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