Malicious PDF — malware analysis report

Static analysis result for SHA-256 701623f8e2561590…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 17:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93c2326c7a4ef14d45ee9df11d6f484d SHA-1: 2a71508933d7267a4167bec330bff487ae6c8b2b SHA-256: 701623f8e2561590d8b73af4810fd27ac8337556f21138c2e79984bee022668a
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are SEO-optimized links pointing to other PDFs related to game hacks and free in-game currency. The primary URL, http://netcdn.co/app/431946152/roblox-medieval-hood-of-mystery-free-game-hack, suggests a lure for downloading malicious content. 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/roblox-medieval-hood-of-mystery-free-game-hack
    • https://tpp.com.tw/image/data/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/robux-in-1min-hacken-german_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/minecraft-java-free_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/roblox-theme-park-tycoon-2-hack-script_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/earn-free-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/does-cheat-engine-work-on-roblox-vehicle-simulator_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/coin-master-free-spins-link-download-apk_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/how-to-use-money-hack-in-roblox_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/free-minecraft-accounts-reddit_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/minecraft-hacker-mask_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/minecraft-for-free-games_GM479516143.pdf
    • https://tpp.com.tw/image/data/files/free-roblox-avatar_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/what-to-do-if-your-account-gets-hacked-on-roblox_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/how-to-really-get-free-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/roblox-freebies-hack-robux_GM431946152.pdf
    • https://tpp.com.tw/image/data/files/free-spin-coin-master-2021_GM406889139.pdf
    • https://tpp.com.tw/image/data/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c0.bin
0f12151773e70e5da12b8e9c1dde6d62242a5db5b72d5caf4658bf0e969bd317
pdf-font-stream PDF embedded font (sfnt) at offset 0x30C0 22904 bytes
font_01_sfnt_off00006430.bin
0173fb01dc5d914911b9ed98d9af60b5ccad039353ddc75725765d5fc6c34767
pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 19540 bytes