Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b31ccfe4a73be…

MALICIOUS

PDF

73.9 KB Created: 2021-07-14 06:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cea44e8dc386daaa0af6851a2110330 SHA-1: 482b0192f4dd88ad835e6d82ac1db2233855a503 SHA-256: a29b31ccfe4a73be25b88723493a537bff832a87035cfa105b593a7f1d916778
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan. It contains multiple embedded URLs, one of which is a Google feedproxy URL that resolves to a PDF file. While the URLs themselves are marked as benign, the ClamAV detection and the presence of embedded URIs indicate a malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

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/CcIy6vlvkUk/square?utm_term=geography+grade+12+term+1+notes+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7f12a52059f1ec1e51ff3/1625813290649/kesejodojojipifonojazi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec717f59713006cbdf70d7/1626108287481/emily_dickinson_all_poems.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_off0000bee0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE0 16792 bytes
font_01_sfnt_off0000d6f7.bin
66614fdcae21132b9cce8b07cc8400e3056df44c26596b5425aee0ce06a51aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 11132 bytes
font_02_sfnt_off0000f0be.bin
353ace9f65077586b60265f72fbe7220331dacd2033ea858a30f7fb515c0bd0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 16064 bytes

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