Malicious PDF — malware analysis report

Static analysis result for SHA-256 de33fa0d30ef102c…

MALICIOUS

PDF

88.7 KB Created: 2021-07-14 03:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6da2c904b2ceccfed8294d248c593b28 SHA-1: 7b16b81134b60e79623882351d6bf1c064682db5 SHA-256: de33fa0d30ef102cbf16e29b14b0034a9e22754853169759e464ef3a93565438
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 suggests the document is intended to redirect the user to external malicious content. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

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/gPkW7oTCsL0/square?utm_term=picture+of+condensation+in+the+water+cycle
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecaa633080d76c7a54966f/1626122851813/51140574476.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ece6e85eed834fcc2faf8d/1626138344278/78447638747.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b31981ab8d1aa9dcfbe3/1625797401674/73221730630.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e93be02dabf27235554676/1625897952237/xikafisejobufamapapereb.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8d4205183b3b579df498/1626115394522/45007473270.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_off0000f7c6.bin
9732cea435fea926029524ce8f0ea0736ad270b7b7e965ff7f3e8a4c9d1b4894		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 10872 bytes
font_01_sfnt_off000110f5.bin
173beb30380e0bdb29518461ccb2c33ba0540f870e69d2fb134030d880cd8243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 17488 bytes
font_02_sfnt_off00013edb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDB 16792 bytes

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