Malicious PDF — malware analysis report

Static analysis result for SHA-256 714ab6df6d0d985f…

MALICIOUS

PDF

97.9 KB Created: 2021-07-15 14:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7ed9523a7958cd3c1695cd79f5c1893 SHA-1: 71ac6475a162f59c4eb5bbe13955893a9fc52d90 SHA-256: 714ab6df6d0d985f8661d837c8bb52ced18498fe3adb42121b64c711aba5c54f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection indicate this PDF is malicious. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8465

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/UQ8tT55rDuk/square?utm_term=emperor+of+the+fading+suns
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee8174462f394a1e460217/1626243444118/the_amazing_fix_game.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edb3ddc7772f26c8533961/1626190814051/biotite_mica_chemical_composition.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecfe82c76d6b0ba008b96d/1626144386726/56291328372.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edda9ee55429721e20998b/1626200734756/baroque_music_is_known_for_its_grandiose_and_elaborate_ornamentation.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edad384325c5343bbb4332/1626189112284/attack_on_titan_english_torrent.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1247df3d323292cd3e57/1626214983254/is_kentucky_fried_chicken_bad_for_you.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8498950202184f10a519/1626113176817/lagovupufawuvelujavafuno.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_off000110fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 16792 bytes
font_01_sfnt_off00012911.bin
4942829bb6e3d7ef05458c88c114ddf324db0d60c848274250e02d80beb25c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12911 10984 bytes
font_02_sfnt_off00014218.bin
099ef99dfcb601e150b618ed830820cabef87f9c9990eb94c03d2a7c1af112a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14218 22236 bytes

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