Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d360f4fc3fcea1…

MALICIOUS

PDF

79.1 KB Created: 2021-07-13 16:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89ed9053260cbfbdc63f685a11592376 SHA-1: d62a38238cbfd9c61927a640b66b6dfe1bf378e8 SHA-256: 34d360f4fc3fcea10392ce651b18c79917d933ae5b31a97696d5b9f63022eaa3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, one of which is flagged as potentially malicious, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a common attack pattern for malicious PDFs.

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/J-SxIuB37Ms/square?utm_term=words+that+rhyme+with+nose
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed63da50bb312daecda54c/1626170330476/pomakamab.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7c8ba81471576eaec018a/1625802938191/college_can_you_kiss_me_first.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8fa4a2c5c2f6215c767fd/1625881162652/constitution_of_england.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_off0000d39d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39D 16792 bytes
font_01_sfnt_off0000ebb4.bin
458dabf8ad2dd6eacf17c3e074c167b18d963af77fab254a173898a162922a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 10660 bytes
font_02_sfnt_off00010406.bin
41f62ffb2625f6161021b0326a687cc1658d2250b083d8d98d1c9ed31cea8d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 17184 bytes

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