Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e90a867fa9a3c2…

MALICIOUS

PDF

141.7 KB Created: 2021-07-12 20:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fa5d65f48ed1864b77d205fa6bf4f9e SHA-1: 17c68306bb3de7e07a9c87ce6d49d68eff800d87 SHA-256: 71e90a867fa9a3c2755409b3c037d0c6c02635745804c71a8b94522a37932031
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF with embedded URLs, and ClamAV detection indicates it is a phishing trojan. While the document body is heavily obfuscated and truncated, the presence of external URIs and the ClamAV signature suggest a malicious intent to redirect users to potentially harmful content. No scripts were extracted, limiting further analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier clean score 0.0605

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://feedproxy.google.com/~r/sq/ugae/~3/iXsW93xxTQA/square?utm_term=historical+development+of+anthropology+pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7db0ef188817f7e0d6b0/1626111408481/ms_word_2007_download_windows_10.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e902afc14ff043cd5ba2bf/1625883311154/pojefugixemodul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ca1c.bin
7c80807d40e795de7a2a4bc24dc5164aeb082dfe9ff1cc97ef19043f35e6392a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA1C 11236 bytes
font_01_sfnt_off0001e40c.bin
aea9ea08fa63e375bc639a662896180cd0d0b75acbcb619b84c9c9ad898ac967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E40C 17748 bytes
font_02_sfnt_off00021250.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21250 16792 bytes

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