Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19971e6b196581…

MALICIOUS

PDF

72.8 KB Created: 2021-07-18 10:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0598706ab3d12ce2891c94f79854452d SHA-1: 66d14becfe76cfb6746b5900a15c2d2e8c271d28 SHA-256: fa19971e6b196581b9d09b8aee131c857d59c49675aefbd31b797d9ed77d760d
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. It contains multiple embedded URLs, some of which are associated with benign content, but the overall detection suggests a phishing or exploitation vector. The PDF structure also shows duplicate object bodies, which can sometimes be used to hide malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1651

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/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=meaning+of+annual+turnover
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f345cc26c2747482df0893/1626555852945/def_jam_fight_ppsspp.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d44692218e076a52a732/1625871430135/bip_s_watch_faces.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_off0000bfb4.bin
de126ce95591b76e898566ea40dc2f0ea76e4111d45659eb012d0c4f415e3c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB4 10380 bytes
font_01_sfnt_off0000d752.bin
cea878a66173f67cbb053f75ce4d8d2574bd4d76bc4542d5e804fc83f8ab90e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD752 15280 bytes
font_02_sfnt_off0000fe00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 16792 bytes

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