Malicious PDF — malware analysis report

Static analysis result for SHA-256 3686171b558eae92…

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 11:17:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c62cffc7edeefc064f37706aca844fb3 SHA-1: 5f01af5a19ef3e87f9cfb92b58a0aa58e40dcca5 SHA-256: 3686171b558eae921406f20eb7d7f4301a3b70e919689246dff0c455a7106f65
102 Risk Score

Malware Insights

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

The PDF document contains numerous links and embedded text related to game hacks, specifically for Roblox, and includes a direct URL to download a file. The heuristic firings indicate a mass of external links and a high ML classification score, strongly suggesting malicious intent. The primary goal appears to be tricking users into clicking malicious links or downloading files disguised as game cheats.

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.tw/app/431946152/roblox-mobile-hack-game-hack
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-on-club-boates-roblox_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-free-robux-promo-codes-2021_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/tiktok-accounts-for-free_GM835599320.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-key-free-spin_GM406889139.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/el-mejor-hack-de-roblox-del-mundio_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-hacking-website_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/ninja-animation-roblox-free_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-get-free-robux-apple-ipad_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/limited-universe-robux-hack_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-kl2-on-roblox_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-hack-on-computer_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/best-tricks-co-robux_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-someone-roblox-account-2021_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/free-coins-for-coin-master-blogger_GM406889139.pdf
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003036.bin
4d788b3b4f4f43ac6ed1a5b240d00796b5af7274a92a17ee2c3f66b49380713b
pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 22564 bytes
font_01_sfnt_off00006282.bin
0e9155019685f09988e5274749080987783afe0cd242ca2fcc27e9f8310fa0e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 18972 bytes