Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf46d33406fa8a1…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 15:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b423f4a181191bb076c8faf46b4124d2 SHA-1: 77a9accea8fc3e1d0518a9cff3c627cbc3905813 SHA-256: bcf46d33406fa8a150d044e149d1ebec814859c96cb1a139f2c3d315e9a77810
102 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a PDF SEO link farm, that direct users to pages promising free in-game currency and hacks. The primary URL, http://netcdn.tw/app/431946152/oprewards-com-roblox-game-hack, suggests a lure for game-related exploits. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to trick users into visiting potentially harmful sites.

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/oprewards-com-roblox-game-hack
    • http://library.stikessuakainsan.ac.id/repository/free-robux-codes-december-2021_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-no-hack-robux-generators_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-robux-working-2021_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/como-ser-hacker-en-roblox-para-tener-robux_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-android_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-in-roblox-2021-jailbreak-mac-os_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-download-android_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-skywars-mega-vip-free_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-game-card-codes-no-survey_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/clothing-groups-for-free-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-builders-club-hack_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/easy-free-spins-coin-master_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-robux-gameguardian_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-prizes-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003303.bin
913570a12ff02387275f6fe02afa24f57d11978619687b8d34f01ce4cedd85a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3303 22868 bytes
font_01_sfnt_off0000660d.bin
326c2906df4de05d76dbe7b57eac088d0ffe39a9b38bb6a74588275837b513be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 19260 bytes

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