Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a86b4fe8f50d43…

MALICIOUS

PDF

44.3 KB Created: 2021-06-11 07:17:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: be66a2d1fd219833d0d077a11e5e6784 SHA-1: 13382719972e44430578b3059d0f431885a0fd2f SHA-256: d6a86b4fe8f50d4352a350f22cd14b91e3853a843951fd0bc874eba2d193d41b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering game hacks and cheats. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download' call-to-action phrase further supports the malicious intent of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-robux-hack-xyz-game-hack
    • https://opac.umrah.ac.id/repository/coin-master-game-hack-online_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/hacks-roblox-xonnek_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-upload-your-own-shirt-roblox-free_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-on-roblox-no-hacks_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-spins-from-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-download_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/mega-nz-roblox-hack_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/cheats-for-lumber-tycoon-2-on-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/earn-free-robux-today_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://opac.umrah.ac.id/repository/only-free-robux_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-do-i-get-free-robux-on-iphone_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/como-tener-hacks-en-roblox-jailbreak_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f0e.bin
e5847fbfc2e6210507c901e47aeed877147b575c15ff9281462edb2a811996e4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F0E 25268 bytes
font_01_sfnt_off00008994.bin
03f06b1954d705dd4a2a11ede4299b13189ef3384f4a9fc20af714f6477739c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8994 18584 bytes