Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c332ff51a941052…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9cb013c0a6f5cada59feb65d9afc77e4 SHA-1: 2f5da571efde613b7cc4c278ce7a1b4a28a1cb2e SHA-256: 0c332ff51a941052afc7d39070ac53696c04b5e8ece491f8367dced7f03ae963
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that lead to pages promising hacks and free items for games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.tw/app/431946152/how-do-i-get-robux-game-hack
    • http://www.pspmrsmlangkawi.com/opac/repository/hack-de-robux-100-real-no-fake_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-link-today_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-spins_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-make-free-robux-on-roblox_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/todays-free-spin-and-coin-links_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-coins-for-flip-master-online_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/hack-coin-master-app_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/robux-without-verification_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-roblox-accessories_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-robux-legit-no-human-verification_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/minecraft-education-edition-free_GM479516143.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-no-email_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-heaven-free-spins_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/win-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003204.bin
7c719b1f80c54a5bde307d05709d5054a3cbe337165f4ec1a67f510f8431f588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3204 22120 bytes
font_01_sfnt_off0000631e.bin
183cb19362a0214898bb3d806a7f31926446548aedd5b57f2a5d458a837a0cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 18988 bytes

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