Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8425fc06fff892b…

MALICIOUS

PDF

77.1 KB Created: 2021-07-12 21:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 288614d41e191a51fc18072dccc6eb96 SHA-1: 2af0f601614677805c2af1a23a25b5da78ea1f9c SHA-256: d8425fc06fff892b934693268ddc98adc557719be4c4dee98f70c21007e1538d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/nCRFBnYrBHY/square?utm_term=cyberbullying+crossword+puzzle+answer+key
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8b6f8bb04542cee56153/1626114927824/formula_for_90_degree_rotation_clockwise.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8764bafb4337c4834cf10/1625847371361/top_o_matic_t2.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8f5afc14ff043cd5ae459/1625879983912/ronda_rousey_theme_song_mp3_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7ce2148fdc25940403621/1625804321777/install_a_driver_for_network_adapter.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9144fc14ff043cd5c6039/1625887824135/41684906467.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_off0000cbc7.bin
1ab1da105168e6590f563423d688ea552fc5df301efe5340b0fbea5faa6a9195		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC7 11212 bytes
font_01_sfnt_off0000e5dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 16792 bytes
font_02_sfnt_off0000fdee.bin
705523ed116d653696fdc8d7bb7d0c75be1183647079a67244695bf384c69f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 16436 bytes

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