Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45a8cb3fe62042f…

MALICIOUS

PDF

78.1 KB Created: 2021-07-21 07:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ee25f8ed5ec34b98180b35ba5adc5e7 SHA-1: fe12dafea8a2949f04652a2b586834667cfe4108 SHA-256: d45a8cb3fe62042ff778feceb9432ecbee2895f622e345184bfc16f443fbba40
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing attempt. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect users to malicious sites. The PDF structure itself may contain exploits, as indicated by the 'PDF_DUPLICATE_OBJ_BODY_INCREMENTAL' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/~3/9xivtwLAy4k/square?utm_term=constable+on+the+prowl
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e79ea89bae382bbabbe8a0/1625792168881/73228642644.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7acf5c244202458a97f0/1626110671439/4_letter_words_with_the_letters_price.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f78141ab09506512d4625d/1626833217201/92801643253.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_off0000d1fa.bin
69808cfa2c23e8d4818826bd2b705aa34e08ee254241a55cc66899fd31f1626f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FA 10512 bytes
font_01_sfnt_off0000e9c5.bin
0c4e62ca2158206535397d26265195d18574e4a6e731ca488fef6730c413e356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 17072 bytes
font_02_sfnt_off00011504.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 16792 bytes

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