Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf61d9ab18c85ce8…

MALICIOUS

PDF

81.6 KB Created: 2021-07-20 14:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfcee6f3a047b85ed7e4dd77b8b3df05 SHA-1: ee887199f62f39b0541913b655246fcfc4fc6b90 SHA-256: bf61d9ab18c85ce8885bd6aa63574e5b779466ffc37047c1ef98eb60c7660896
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate the presence of an external URI that, despite being labeled as confirmed benign in the provided data, is part of a lure. The ML classifier also flagged the PDF as malicious. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall context suggests a phishing attempt disguised as a link to game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/eaN1Eb74jJI/square?utm_term=hill+climb+racing+2+unlimited+money+and+gems
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2af074f27972c6039526b/1626517255621/86162475836.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecafe29517252e552956fd/1626124258384/fegevipakoponezojejijarus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5ac47426fb5109f69f5e/1626233540715/86101450016.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0fa40adf71e7547caff20/1626405440914/ant_man_and_the_wasp_torrent_yts.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_off0000dd9c.bin
2ba1fe8865b9c4dadbd07ef71a503390df6a2d7d4c7bdedc283a9191dedd8fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 11180 bytes
font_01_sfnt_off0000f790.bin
fc7fa1f740ed585f789edd79435843bc4c04a3e127592a9bbdfb44c812132273		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 16544 bytes
font_02_sfnt_off00012250.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12250 16792 bytes

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