Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa95e2879157a29c…

MALICIOUS

PDF

75.7 KB Created: 2021-07-14 10:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa4bf7ed1ec66e6aef0cba8573d2b539 SHA-1: f5c585ce2feff094af4d66049f8b15e53d1d953c SHA-256: fa95e2879157a29c0e493640333c3837ef191ca9c00dd14444f2103d2e857be2
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though some are marked as benign, suggests an attempt to direct users to external resources. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' point towards a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/kVSxLQpkboc/square?utm_term=signs+of+borderline+personality+disorder
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda550cd5f69124b41d982/1626187088894/901319539.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca43c7d354a5e86a60960/1626121276670/weboga.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7bd239bae382bbabe02c6/1625799971304/bible_lucifer_quotes.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8efeeb132fa362070fa1e/1625878510391/english_text_book_of_class_10_cbse.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec96b49a1cf201f8065219/1626117812595/tale_of_the_nine_tailed_episode_9.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee711d2485902f3e768f8d/1626239261113/liberal_feminist_theory.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5b85a005482cc1586fc9/1626233733318/group_7a_on_periodic_table.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_off0000c892.bin
91ad8da963d3bb9d5fbe97e4139aca9c5eaab1ab61252902382f21de924a2ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC892 15824 bytes
font_01_sfnt_off0000f154.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 16792 bytes
font_02_sfnt_off0001096b.bin
dd6bfaa092e8e76908d07a6349c9977dce3587be913cf49e9e1aa75373976600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 11004 bytes

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