Malicious PDF — malware analysis report

Static analysis result for SHA-256 354c60332659db38…

MALICIOUS

PDF

47.9 KB Created: 2021-06-11 04:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 23bfe8ff903ff8fdd3be924586648023 SHA-1: eb2dc4469526797d1d106183b0a6b70a5789e584 SHA-256: 354c60332659db3849c797435951b0658ef28f3d6226bed6d940503656a59b4f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, all pointing to websites offering cheats for popular games like Robux and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/free-robux-obby-no-password-game-hack
    • http://astdubai.co/userfiles/files/coin-master-heaven-links_GM406889139.pdf
    • http://astdubai.co/userfiles/files/free-coin-master-spins-no-human-verification_GM406889139.pdf
    • http://astdubai.co/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://astdubai.co/userfiles/files/roblox-swordburst-2-speed-hack_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdf
    • http://astdubai.co/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-spins-save_GM406889139.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://astdubai.co/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://astdubai.co/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdf
    • http://astdubai.co/userfiles/files/roblox-studio-free-robux_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/android-coin-master-3433-apk-hack_GM406889139.pdf
    • http://astdubai.co/userfiles/files/minecraft-free-play-no-download_GM479516143.pdf
    • http://astdubai.co/userfiles/files/free-coin-master-gifts_GM406889139.pdf
    • http://astdubai.co/userfiles/files/minecraft-free-games-no-download_GM479516143.pdf
    • http://astdubai.co/userfiles/files/robux-without-verification_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005213.bin
6d95d8fcda23c4f065c6e5d18adc99d63fa59f00bf0bce420029600640122684
pdf-font-stream PDF embedded font (sfnt) at offset 0x5213 29944 bytes
font_01_sfnt_off00009719.bin
86602a70bc35fbd670cb1122bbf1d86dc952ae69db2e87a350dc1a601271d560
pdf-font-stream PDF embedded font (sfnt) at offset 0x9719 18916 bytes