Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef9ca9d3149535c…

MALICIOUS

PDF

67.0 KB Created: 2020-11-25 15:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1bf568596cff81432f2cbf2fcfe35b2e SHA-1: 1ba73583dfaa2a543bed14caeaf55842782d1e99 SHA-256: cef9ca9d3149535c93af0c06a6594017de3f0cebd2da2f419fe64fb5bff58c27
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page. The document body, though heavily obfuscated, contains metadata related to its creation, suggesting it was generated by a tool rather than authored content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=katonah+metro+north PDF link annotation
    • https://fajalosi.weebly.com/uploads/1/3/4/9/134901252/827f489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_5fa39cd9ad684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f89773055c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5fa3170a1b5e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fbcecaa8be0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5fa52921e1af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9a6f03bde70.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/xabalaru/64987585431.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/xozasogagunidagerexol.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/63522749923.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_off0000c831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC831 4684 bytes
SHA-256: a6684b80c7cf5a655c272a1f0ad0857944671ba04fa0e83923978be235ef5277
font_01_sfnt_off0000d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 11424 bytes
SHA-256: fa78799f6be56e78d774ddad69aa379391d54d5ecf9da40042e08389bd573d87

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