Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd15a01055aef90…

MALICIOUS

PDF

42.1 KB Created: 2021-05-14 21:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7afaece7ae7ddac6d514f2b69719ce24 SHA-1: 71da6b5f9121281f977a54e422817d6c536bc533 SHA-256: ddd15a01055aef90fd629e3d67359a0e094e9aa02587307a1727ec15db70d821
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering game cheats and hacks for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially malicious content indicates a high likelihood of leading users to malware downloads or phishing sites. No scripts were extracted, but the PDF structure itself is designed to facilitate this redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-coins-and-spins-link-today-game-hack
    • https://www.prodex-holz.cz/images/roblox-apk-hack_GM431946152.pdf
    • https://www.prodex-holz.cz/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • https://www.prodex-holz.cz/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://www.prodex-holz.cz/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://www.prodex-holz.cz/images/hack-coin-master-game-download_GM406889139.pdf
    • https://www.prodex-holz.cz/images/synapse-roblox-free-download_GM431946152.pdf
    • https://www.prodex-holz.cz/images/hack-coin-master-free-spins_GM406889139.pdf
    • https://www.prodex-holz.cz/images/coin-master-free-spins-2021-hack_GM406889139.pdf
    • https://www.prodex-holz.cz/images/how-to-get-robux-on-roblox_GM431946152.pdf
    • https://www.prodex-holz.cz/images/descargar-coin-master-hackeado_GM406889139.pdf
    • https://www.prodex-holz.cz/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdf
    • https://www.prodex-holz.cz/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.prodex-holz.cz/images/coin-master-free-spins-whatsapp-link_GM406889139.pdf
    • https://www.prodex-holz.cz/images/coin-master-hack-using-cheat-engine_GM406889139.pdf
    • https://www.prodex-holz.cz/images/free-coins-coin-master-today_GM406889139.pdf
    • https://www.prodex-holz.cz/images/coin-master-free-spins-hack_GM406889139.pdf
    • https://www.prodex-holz.cz/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://www.prodex-holz.cz/images/minecraft-tower-defense-hacked_GM479516143.pdf
    • https://www.prodex-holz.cz/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://www.prodex-holz.cz/images/free-minecraft-printables_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004986.bin
816fb1c29cc2db50f50df36322af642d7925882591b401968c8bd16702cd0209
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4986 24692 bytes
font_01_sfnt_off000081e8.bin
33825415dca9230cb3646c42e74ea5f1b776d8c47be8f6fdd7469cc236cf4eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x81E8 18412 bytes