Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3a46af4a85cae5…

MALICIOUS

PDF

76.4 KB Created: 2021-07-12 20:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ac1199119acb94069a46501fb4b210d SHA-1: cdf1ea2e4a7417e2029c7959b9376dc204095722 SHA-256: fa3a46af4a85cae520dcfd81fdd68bb0be0a9d3eca3693f85d20d1df3af2f6f7
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a phishing and trojan detection. It contains an embedded URI that mimics a search result, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect the user to external content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/r_nBws6J8g8/square?utm_term=how+do+you+calculate+the+number+of+electrons
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e88ab8ea4f6832d9c6b6d7/1625852600358/endocrine_and_exocrine_glands_examples.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_off0000c7e3.bin
b01340501d026144468c377e4a95fe61a0ed7a918d685d8c2b8aeda597395111		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E3 16828 bytes
font_01_sfnt_off0000f41b.bin
b4d01c867c1d0e3d7eadfe8317bb0a59ada1c64d9f2211a39d1ca89a5983c3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 11080 bytes
font_02_sfnt_off00010dc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC9 16792 bytes

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