Malicious PDF — malware analysis report

Static analysis result for SHA-256 801dfeb36b6e5abc…

MALICIOUS

PDF

77.5 KB Created: 2021-07-15 18:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7802681a6a928802cef8304743d57c50 SHA-1: 554056334fd3bb54eace64f1d2a0460e64712190 SHA-256: 801dfeb36b6e5abc35dff0007c6bfd6b3496c400af59baff439b37b48665bb9a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. The embedded URL, while marked as benign, is suspicious in context. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of PDF heuristics and the overall malicious verdict suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8897

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/gOBB6uaVNRA/square?utm_term=watch+harry+potter+6+free
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e965d112fb7d0b279560dd/1625908690176/into_the_wasteland.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed87d42ae47d2ac9240a85/1626179540999/76913417459.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90ccddefa333328a9b7b6/1625885901486/bill_nye_living_and_nonliving_things.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8fbfeb10b9b33fa964453/1625881598614/67853590353.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec93bf8c19ad4998dc514b/1626117055960/91886548728.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecbb6f410b6f53fe1331c3/1626127215215/dozusaregobu.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_off0000ccc8.bin
c66a5fe00fddf06445e85ded78bc84804d07fdd681e58a5413b5ff1695d5f68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC8 17460 bytes
font_01_sfnt_off0000fa48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 16792 bytes
font_02_sfnt_off0001125f.bin
2049f2abadae57c048ea43661012090f9b24f3a525944f5be265125174c6df0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125F 10444 bytes

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