Malicious PDF — malware analysis report

Static analysis result for SHA-256 6778d09432b67b5e…

MALICIOUS

PDF

74.5 KB Created: 2021-07-13 20:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b889af2eeed62b019fa52f7fae7f30f6 SHA-1: ffc10b0a8be44b5269dcb3e65b65d221e13201d5 SHA-256: 6778d09432b67b5e718342d8b12d6e3e53c638aa87c76b0b242c2476df8679fe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs that likely serve as lures or redirect to malicious sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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/UkUWPC8UKDU/square?utm_term=how+to+trade+in+stocks+by+jesse+livermore+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a12ad1bf7105ccae152/1626110483063/cheat_codes_for_pokemon_ruby_gba_emulator.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8d23809171274fed7aa25/1625870904392/free_dd_character_creator.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8717d51ef7455b855ce63/1625846141998/standing_in_line.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7aa211873c46ac936b075/1625795105193/gaxukowuniniju.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec86a3dbb514329faf7491/1626113699834/lilith_and_lucifer_relationship.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_off0000c133.bin
5073bd123785526a224e9709bf5cf00adea5e2b6bd6b8b4bd2bfd3cbb4117355		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC133 16168 bytes
font_01_sfnt_off0000eb00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 16792 bytes
font_02_sfnt_off00010317.bin
d929a0d3feff2aabf40917f72df1768cf23e7180e5cf8d674a45c4274f95c9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 11400 bytes

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