Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67f111e31d80e61…

MALICIOUS

PDF

81.8 KB Created: 2021-07-13 21:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81c8c2b47b0358fe3662bd200751f4c4 SHA-1: 8ba4b5de64ae842dc7d575c7d3b88177e8895435 SHA-256: f67f111e31d80e6127ae8b28c186efddb885a712b7816176744a5b9398593972
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the overall structure and detections point to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aauXj3bnHUA/square?utm_term=words+to+describe+yourself+starting+with+a
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec856aa1f8f93f64abfa67/1626113386887/ghd_sports_apk_download_app.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec84cc7726b430b4685afe/1626113228901/use_of_under_preposition.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec94c151a87c5d75ad5f9d/1626117313321/cost_for_a_boob_lift.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e836f2a431ed42d2ffb8c6/1625831154167/mumur.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e775222b69c91f9b4237e7/1625781538610/90002440346.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e95ea6b630645a0ef928b8/1625906854585/movalaxale.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8a7d41dcda57114cd898e/1625860052878/kojojug.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_off0000db11.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 16792 bytes
font_01_sfnt_off0000f328.bin
1de2525a35430db5caef89b4bd49b32ca510b7400888803e44dba09c106f849a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 11188 bytes
font_02_sfnt_off00010d1d.bin
895e1e5a0ea69c155bde82a1c5c355f3482f0a6f74f4eee2fa9f081d14347d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 16932 bytes

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