Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88c9c999a15ff2d…

MALICIOUS

PDF

33.0 KB Created: 2021-06-30 02:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bfee3d8341cff35b9bb7cda5370176f1 SHA-1: 732491713d5395c1bacd3c8cef71811f6c45a3b5 SHA-256: b88c9c999a15ff2df57282ce00aebd32e56ce733a6ae3279505d30e7c9c2ee66
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes game cheats and hacks, indicating a lure for users to download potentially malicious files. The heuristic findings confirm the presence of external URIs and a link farm, strongly suggesting a malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-money-cheat-game-hack
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/vehicle-simulator-hack-script-roblox_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-de-juegos-apk-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/husky-roblox-free-robux-obby-link_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/are-there-any-obbies-that-give-free-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-accounts-28-october-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/what-is-a-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-murder-mystery-roblox-a-telecharger-gratuitement_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-keep-roblox-from-slowing-down-when-hacking_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-de-roblox-jailbreak_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-get-free-robux-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-websites-legit_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/mad-city-cheat-roblox-kill-all_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-black-panther-mask-free_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-instagram_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-hack-apk-mod_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002aa8.bin
7e452cf1971da67dfd1fb75d977cd67460a40edca96a9779f70a757cc045feee
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA8 22244 bytes
font_01_sfnt_off00005c02.bin
1195b0eac1940e0cd552a3831d9a524f6d4f1f3f7dd661e6359170912f15b7a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C02 19132 bytes