Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59a7f546554e130…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 18:43:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f9d066e581c441edd5a605c79c1f5ba3 SHA-1: 217c8b5e362d819bdb80341765d57a185dd72825 SHA-256: b59a7f546554e1300906485c8de2b19bb68b1cdf0c4f1f550c6dc1c9f58b16c2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external resources, many of which are hosted on domains suggesting game-related cheats and hacks. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of these links, and the 'ML_NYX_PDF_MALICIOUS' score is very high, suggesting malicious intent. The document body and extracted URLs point towards a lure for users seeking game exploits, likely to download malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/how-to-hack-any-account-roblox-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/guess-that-song-roblox-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-peoples-accounts-in-roblox-notfake-proof_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-grould_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cheats-for-bloddy-mary-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-free-inspect_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-jailbreak-unlimited-rocket-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacks-exploits-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-do-hacks-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/1-most-best-free-hack-in-roblox-ever_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/natevang-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-obby-that-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-human-verification-2021-or-survey-ios_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 22980 bytes
SHA-256: 512ea8d409d0c5687316316377ba8a8f6c2fd1a601dafbb5d80ff973355d8c17
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 19644 bytes
SHA-256: 5e6105656f65291cfddb4b0069a577860e569c4e3b6e2675ccfdf9015446e283

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