Malicious PDF — malware analysis report

Static analysis result for SHA-256 346cc2cd4a57f85a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 14:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c3a6283b24d6ddc8a461c786971de1db SHA-1: 30cbccb4827d503d5aadede6644f21b92fd96fc4 SHA-256: 346cc2cd4a57f85ab942724e15945b7383be7e536a69e84fdaf0dff0e52a2c6a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are related to game hacks and exploits. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. The document body, though partially garbled, contains URLs that align with the heuristic findings, pointing towards a lure for users seeking cheats or exploits.

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/fps-free-games-best-on-roblox-2021-game-hack
    • https://www.bumbar-sport.hr/files/minecraft-115-2-hacks_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/how-to-get-your-hacked-account-back-on-roblox_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/free-workink-downloadable-roblox-avatars_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/what-games-give-you-robux_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/minecraft-java-edition-key-free_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/hack-roblox-users_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/coin-master-hack-app-download-free_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/free-robux-with-no-verification_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/free-public-roblox-hacks_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/how-to-hack-roblox-and-get-unlimited-robux-2021_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/free-robux-codes_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/roblox-weird_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/free-spin-coin-master-link-today_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/robux-hacks-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb3.bin
b38f9c8e9b65543cc56016e2cfbd04e36e1d3aeb8cd1e31142fbffe1ede37217
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 22352 bytes
font_01_sfnt_off00005ffd.bin
5cae3503f5b11d74c11ff838464e684ed2528bbdfce7bee98075612c0a2f9811
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 19592 bytes