Malicious PDF — malware analysis report

Static analysis result for SHA-256 900c2bb47463e5b2…

MALICIOUS

PDF

73.4 KB Created: 2021-07-19 23:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cefcf83196ae99ef37fee3ec7deec415 SHA-1: 7bcefc5deb9508723edb34fb1f6f7b820dd7c6c7 SHA-256: 900c2bb47463e5b21bba4be8a065a31cae328eb9038a78351b6bf375981af258
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV heuristic 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing and trojan payload within this PDF. The presence of embedded URLs, even if currently flagged as benign, indicates an attempt to redirect the user to malicious content. The file's structure and detection point towards a malicious PDF designed to exploit vulnerabilities or trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.1749

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/jEScUJLm1bs/square?utm_term=geographical+discoveries+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee0d1c7426fb5109f12f8a/1626213660449/jezikumoxetalagivifonok.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_off0000bffc.bin
463defab4bf6075cf80d687d8c8339f558c289f17272dfcf3168c6b09ed37587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFC 10800 bytes
font_01_sfnt_off0000d8d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 16792 bytes
font_02_sfnt_off0000f0e3.bin
82503a767bf30461f471c578bcf93a950ae24bb4e9a746a8747ca9d27c4b446b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 15956 bytes

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