Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ca5fd970227e89…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 09:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 85bea6a03f8914531f284b3fde2a2b97 SHA-1: 8451e8c714f55dba718edff9b52e29a5f5d2ef1b SHA-256: e6ca5fd970227e897ff7ec9650c65bbfe51e7ec8f394959ab8f425cf33b3442c
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to files with names suggesting game hacks or cheats. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to download potentially harmful files from the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-coins-on-coin-master-game-hack
    • http://artistaone.co/userfiles/files/free-robux-real-working_GM431946152.pdf
    • http://artistaone.co/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://artistaone.co/userfiles/files/free-coin-master-cards-link_GM406889139.pdf
    • http://artistaone.co/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdf
    • http://artistaone.co/userfiles/files/easy-coin-master-hack_GM406889139.pdf
    • http://artistaone.co/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://artistaone.co/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://artistaone.co/userfiles/files/earn-roblox_GM431946152.pdf
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-robux-with-no-survey_GM431946152.pdf
    • http://artistaone.co/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdf
    • http://artistaone.co/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://artistaone.co/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://artistaone.co/userfiles/files/free-coin-coin-master_GM406889139.pdf
    • http://artistaone.co/userfiles/files/legit-free-spins-coin-master_GM406889139.pdf
    • http://artistaone.co/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdf
    • http://artistaone.co/userfiles/files/roblox-free-items_GM431946152.pdf
    • http://artistaone.co/userfiles/files/coin-master-2021-free-spins_GM406889139.pdf
    • http://artistaone.co/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005172.bin
b37fcef041e8944d185733c41c0f549d1f01010c70bd774cb322760cf2c7b634
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5172 25044 bytes
font_01_sfnt_off00008b6a.bin
6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 17712 bytes