Malicious PDF — malware analysis report

Static analysis result for SHA-256 624cdffea931bc54…

MALICIOUS

PDF

77.2 KB Created: 2021-07-17 00:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30b6625f84961b88050cd9ac116029cb SHA-1: 26d21e63b8c68f9d1367f1f23de565d54fd5216c SHA-256: 624cdffea931bc541a47bba54e5a1e4c1a68df6ffd19c96e64eb0ba100169675
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan delivery attempt. The presence of embedded URLs, though many are confirmed benign, suggests an attempt to redirect the user. No scripts were extracted, but the PDF structure and heuristics point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/iXsW93xxTQA/square?utm_term=the+fourth+noble+truth+is
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1f3ad8ccd1957f409ade4/1626469293257/rutufe.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede4272e8a4a2aca7a9efb/1626203175830/87307474834.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7fef4d93aeb546a15eb14/1625816820655/55921040633.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed93835eed834fcc38973c/1626182531618/57102760649.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_off0000ce85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 16792 bytes
font_01_sfnt_off0000e697.bin
6acc7846d4648ca2343efd13fea8680652e25ab7aaad87d544703c832216fb19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 16612 bytes
font_02_sfnt_off000111cf.bin
f8ae66d474d520b7dd85c8d7770980bf5fd6a269c54b6e1bf3fddce97726f869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111CF 10352 bytes

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