Malicious PDF — malware analysis report

Static analysis result for SHA-256 3986cd12575b61fe…

MALICIOUS

PDF

83.8 KB Created: 2021-07-14 09:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c202189cb5ab1b6248f79baf5c09b1c SHA-1: d94b5d7cd4f8822da52412e958ab1bb37b0c8387 SHA-256: 3986cd12575b61fe0efba1d79a9f815c0cc449dc5dd0f002e459ead31ae60128
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 phishing or trojan threat. It contains embedded URLs, one of which is associated with a Google feed proxy, suggesting a potential redirection to a malicious site. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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/pL_UGxDroB4/square?utm_term=defib+voltage+and+current
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede8cf30d23a75506461b9/1626204367601/rebovaguvefolilozov.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edefeb4ff81d3e2816280c/1626206187411/28490971424.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8417384a485174d86a459/1625833843211/51230284241.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_off0000e674.bin
7412d42d87a6b53b3620a4fb56534f8e6b453c9d6a3fd4fbd091ede2d4823046		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10792 bytes
font_01_sfnt_off0000ff3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 16792 bytes
font_02_sfnt_off0001174e.bin
2fa9f350c34dbcb454ac7b82ccefad28af1a3d4ce5487afe43e57d915f0c3d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 16872 bytes

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