Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace1236289cf7ce3…

MALICIOUS

PDF

35.2 KB Created: 2021-06-21 23:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e7fec63ba80f420c3ff4fbb1547980e9 SHA-1: 4149c1f9523f9ebcc5d0b84fe4f30915715e3f07 SHA-256: ace1236289cf7ce3072aa3f6d97849a006f0ba926a3af7b19f8e2507d5ac34bb
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering free virtual currency and game hacks, such as 'free-robux-gift-card-codes-800-robux-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious link farm designed to redirect users. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-robux-gift-card-codes-800-robux-game-hack
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/robux-hacks-2021_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/hacks-para-tener-robux-gratis-2021_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-hack-tool-apk-download_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/robux-hack-no-download-no-survey-no-verification_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-coin-spin_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-giveaway_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/try-minecraft-free_GM479516143.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-t-shird_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/pubg-uc-jazz-cash_GM1330123889.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-downloading-apps_GM431946152.pdf
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/smurf-backpack-gives-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b5.bin
5119399a7a48fe1b6e6e7eb279302a42a3b82a6791e560c5e8a132a1a181b085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B5 22220 bytes
font_01_sfnt_off00006302.bin
1600f75b1b307d6d265054139a06c6b974c75450fffa451378f8f33bbb244470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 19496 bytes

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