Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e7b0dfc5384720…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 11:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7040de3e59b49fd36c55adc8c5668c91 SHA-1: 478693b069073e4dbf813ef3c314c306ed46d76c SHA-256: b8e7b0dfc5384720e7a9a09dc13bf252500516ed7b059cb5c51007c9488e9bfc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to sites offering game hacks and free in-game currency. The primary URL http://netcdn.co/app/431946152/hack-roblox-luq-game-hack likely serves as a download or redirect to a malicious payload. The ML classifier also strongly indicated maliciousness.

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/hack-roblox-luq-game-hack
    • https://www.ferraroni.net/public/risorse/ck/files/free-spins-coin-master-2021_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-link-hack_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/www-roblox-com-robux-free_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/top-10-free-robux-sites-that-actually-worked_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/hack-a-game_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/huskybuckscom-free-robux_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/bloxland-earn-free-robux_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/100-free-spins-for-coin-master_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-server-hosting_GM479516143.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-cheat-codes-for-robux-2021-on-tablet_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/pokemon-go-free-offers_GM1094591345.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/free-spin-card-exchange-coin-master_GM406889139.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/free-rixty-codes-for-roblox-2021_GM431946152.pdf
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f50.bin
42074c6b5b30dfc7b46d1a4ef33a63e4d9d118d18e45e3f5daa602f1c289b91c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F50 22288 bytes
font_01_sfnt_off000060dc.bin
0eb721d4b41af9f82bcb8c86b6a2299761cd3d2481c11fb242e96cd1e8778ead
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 18968 bytes