Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6581dd6d69f898…

MALICIOUS

PDF

81.8 KB Created: 2021-07-15 09:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06ab2c138c8f04b18507d99beaedaec3 SHA-1: 0e78b26da9a8b950e4f955097caf906bc3eaedf9 SHA-256: ca6581dd6d69f898d621885942550acb9cd37be2d29a29f433c498cb95ccc5e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded URLs, one of which is https://feedproxy.google.com/~r/sq/ugae/~3/7R6buoffwiA/square?utm_term=c+programming+final+exam+questions+and+answers, suggesting a phishing or redirection attempt. The presence of PDF-specific heuristics further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/~3/7R6buoffwiA/square?utm_term=c+programming+final+exam+questions+and+answers
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efce2536870d1a2db57503/1626328613739/places_in_abu_dhabi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed358d43ec04194fd57443/1626158477548/29106953210.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9097f91837287387d1eb/1626116248145/kulefepikoxeliro.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_off0000daf4.bin
acaf241f10c6df35726cc566fc32e66fcf7c8f46e9ef338f241faf7a81f19187		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF4 11304 bytes
font_01_sfnt_off0000f518.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 16792 bytes
font_02_sfnt_off00010d2a.bin
e44ea2acfd97dec69115cbd45940d7fd3a3b32c8c852565ce54f61f88c053662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2A 16984 bytes

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