Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb31af193dfe98a…

MALICIOUS

PDF

79.9 KB Created: 2021-07-12 23:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64713306de84391bd13830789462c77c SHA-1: c540af742a69a582faafc71128e4b7fb1364f7fa SHA-256: 9bb31af193dfe98a055b513fd0d2601ea0724d9948569a4a194eacdf992cf320
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. The embedded URL, although flagged as benign, is presented in a context that suggests a lure, potentially to a phishing site or a download. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content or intent beyond the presence of the URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/IdU8rIDf9lQ/square?utm_term=sheep+heart+dissection+lab+worksheet+answers
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8492fda9c5376a3b77c84/1625835823903/49535950519.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e937fd2dabf272355526a5/1625896957543/jamefoledadodilu.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_off0000da30.bin
71a43120bc73829e93490afae9b417ee3b61acadbb9f9ae598aeaf1fdd1081f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 15796 bytes
font_01_sfnt_off000102a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A1 16792 bytes
font_02_sfnt_off00011ab8.bin
09ffc718ade742304c522736fcc1cfcdbb9327505c660d73e33f41b2b98cbca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 11004 bytes

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