Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dac145f25f7e2b…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 22:45:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7288fba0c3eb8de495f62b5b28d1ecef SHA-1: a354250e5e9c19e5d2c6b2f43e69bfc9ef499c6b SHA-256: d9dac145f25f7e2bbde189650228084bd56ce7866604b2394bf8ab76712f8c2e
102 Risk Score

Malware Insights

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

The PDF document contains a high number of external links, many of which are SEO-optimized and point to game-related cheat sites. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. The document's primary purpose appears to be a link farm designed to attract users searching for game hacks and in-game currency, ultimately leading them to external, possibly malicious, resources.

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/robux-fun-hack-game-hack
    • https://www.sonestad.se/library/repository/free-tiktok-likes-and-followers_GM835599320.pdf
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-hack-apk-2021_GM406889139.pdf
    • https://www.sonestad.se/library/repository/robux-com-free-robux_GM431946152.pdf
    • https://www.sonestad.se/library/repository/roblox-free-clothing-how-to_GM431946152.pdf
    • https://www.sonestad.se/library/repository/roblox-ftw_GM431946152.pdf
    • https://www.sonestad.se/library/repository/coin-master-time-speed-hack_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-free-spins-hack_GM406889139.pdf
    • https://www.sonestad.se/library/repository/code-for-free-red-jacket-roblox_GM431946152.pdf
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-easy_GM431946152.pdf
    • https://www.sonestad.se/library/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • https://www.sonestad.se/library/repository/you-promised-my-son-free-robux_GM431946152.pdf
    • https://www.sonestad.se/library/repository/no-robux_GM431946152.pdf
    • https://www.sonestad.se/library/repository/elite-hackus-exec-roblox-wd8_GM431946152.pdf
    • https://www.sonestad.se/library/repository/cm-spins_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-admin-free-spins_GM406889139.pdf
    • https://www.sonestad.se/library/repository/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • https://www.sonestad.se/library/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • https://www.sonestad.se/library/repository/apps-to-hack-coin-master_GM406889139.pdf
    • https://www.roblox.com/my/tasks
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003113.bin
8914005fb055ae492ccfa7d4dab2960c34d22ec96e1b06af00f432ae24363327
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3113 23684 bytes
font_01_sfnt_off00006713.bin
c1015eee087a13dc62c4aba5d792f044bb527228a7c6867863e8b6cb34361f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 18884 bytes