Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb7d01117fc8d1f…

MALICIOUS

PDF

46.2 KB Created: 2021-05-14 20:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 633401ba8858741bea1b3e8d7d9ed7ac SHA-1: 790430b8c815b3038d5bdfc3efa0fff0374387d5 SHA-256: 2bb7d01117fc8d1fa495c2ecf308b04cb038630e40b35d5f260ee08a0e4c46e3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to files with names suggesting hacks or free downloads for popular games like Coin Master and Roblox. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links points to a link farm designed to distribute potentially unwanted or malicious applications. No scripts were extracted, but the document's structure and embedded links suggest a lure for users to download applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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.xyz/app/406889139/free-spins-coin-master-2021-app-game-hack
    • http://killebergsridsport.se/images/legit-coin-master-hack-october-2021_GM406889139.pdf
    • http://killebergsridsport.se/images/free-minecraft-client_GM479516143.pdf
    • http://killebergsridsport.se/images/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • http://killebergsridsport.se/images/e-free-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://killebergsridsport.se/images/free-coins-2021-coin-master-link_GM406889139.pdf
    • http://killebergsridsport.se/images/www-coin-master-hack-xyz_GM406889139.pdf
    • http://killebergsridsport.se/images/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://killebergsridsport.se/images/infinite-robux_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://killebergsridsport.se/images/minecraft-client-download_GM479516143.pdf
    • http://killebergsridsport.se/images/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://killebergsridsport.se/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • http://killebergsridsport.se/images/minecraft-free-games-no-download_GM479516143.pdf
    • http://killebergsridsport.se/images/body-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-invite-friends-free-spins_GM406889139.pdf
    • http://killebergsridsport.se/images/apps-to-hack-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/roblox-free-robux-hack_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d93.bin
8d74e21c39cf59a2890de1d000649611e17f7332b6f5457516e3844c1a9b3c66
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D93 25460 bytes
font_01_sfnt_off00008893.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8893 2824 bytes
font_02_sfnt_off00009235.bin
6b6cd7167012eeb1812e943ff49937c2219a320edcaba7462c006fdd54a5786c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9235 18288 bytes