Malicious PDF — malware analysis report

Static analysis result for SHA-256 8733045b1d37a6be…

MALICIOUS

PDF

85.3 KB Created: 2021-07-21 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 547522ea125ee0c3b86b160ab2e4f576 SHA-1: 6c56d759629a01b7d9fbaa625a45e340a1c73e45 SHA-256: 8733045b1d37a6bee7458dd5f7f3a6f66e865e5180a081f64e233b453d7133c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. Although the document body is heavily obfuscated and unreadable, the presence of an external URI heuristic suggests an attempt to redirect the user. The PDF structure and embedded artifacts do not provide further clues about the specific attack, leading to an unknown family classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/eoPDrVzwpx0/square?utm_term=classifying+linear+systems
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1ee6f01697f42df471db9/1626467951829/23935831535.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f09b40816bb346b5d1bfc8/1626381121058/online_tv_show_streaming_sites.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4c62fbb7e64222d08eef0/1626654255580/new_testament_scriptures_on_hope.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3f7700b174908921448de/1626601328303/care_freedom_brochure.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7da00cf33f708d79bedb/1626111393018/michael_connelly_best_novels.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_off0000ea47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 16792 bytes
font_01_sfnt_off00010259.bin
f4032a2acb3c8d0090cc0d4f3f0290c1eb6870917fc64d1c17eba056c069ada5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 17420 bytes
font_02_sfnt_off00012ffe.bin
e4051e33a36c84259ca5a41aaac25b1d47a75883a5f6445e0e451c9233acffcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFE 10580 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.