Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51dfa8e2ebe9396…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 21:21:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94ca42ac69a647e527b6fff7354b69ba SHA-1: bfba08e1af771c1288e13493c0bfd50d0cae9da9 SHA-256: d51dfa8e2ebe939680f2f84f053412b1c907d679aa7dae305c474c3562db85c1
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are hosted on sunnygarden.com.tw and appear to be SEO-optimized PDFs related to game hacks and cheats. The primary URL http://netcdn.tw/app/406889139/is-coin-master-hack-safe-game-hack suggests a lure for users seeking exploits. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful content.

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/406889139/is-coin-master-hack-safe-game-hack
    • https://sunnygarden.com.tw/image/data/files/coin-master-apk-hack-358_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-amby-hack_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-roblox_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-script-executor-2021-free_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-on-roblox-2021-no-survey_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-robux-with-hacking-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-promo-codes-2021-april_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/get-free-robux-no-verification_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-hacktman_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/use-cheat-engine-on-roblox-tycoons_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-link-app-download_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/explaining-video-free-robux-and-diamonds_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/best-way-to-get-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-root_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robuxs-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/casper-hack-roblox-jailbreak-noclip_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319d.bin
c99f7cc45c228aceaf2ae04053677f2cd1653963f65362ec9b96235fef9d1a65
pdf-font-stream PDF embedded font (sfnt) at offset 0x319D 22796 bytes
font_01_sfnt_off000064b5.bin
a807d1625683e97b551ec15cde342714fac857768296158707709b617539b003
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 18004 bytes