Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab9d24632b9a512…

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 09:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ffef59f5f487a8ef6251621108da0b78 SHA-1: d1360d234e2ba27ab41f287bbf93c71d32f31b9a SHA-256: 8ab9d24632b9a512718d58cebd315df4c68c518ca7d1793dca2f155cb5f07a89
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that attempts to lure users into downloading files related to game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-get-a-hacker-out-of-your-roblox-account-game-hack
    • https://www.legclub.org/uploads/files/files/pokemon-go-free-zip-code_GM1094591345.pdf
    • https://www.legclub.org/uploads/files/files/coin-master-free-spins-link-cheat_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/minecraft-free-demo_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/free-girl-hair-roblox_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/download-minecraft-free-hiapphere_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/coin-master-hack-without-verification-ios_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/how-to-get-free-robux-no-waiting-2021_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/roblox-free-play-no-install_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/twitter-coin-master-free-spins-link_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/infinite-robux-hack-2021-script_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/coin-master-hack-android-no-root_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/no-scam-free-robux_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/websites-that-give-you-free-robux_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/como-ser-hacker-en-roblox-en-grand-blox-auto_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/android-coin-master-3433-apk-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000305d.bin
eb9a36a90309c18bf20355fb4a1287d8c866a49bef35686986aa47d48e229970
pdf-font-stream PDF embedded font (sfnt) at offset 0x305D 22548 bytes
font_01_sfnt_off000062a4.bin
4e6771c1ffd778d95f7d5c5ac887c2151678fe4f8ab3252e482d899f6270274c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A4 19228 bytes