Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e66887eb8d6cea…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 10:18:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: acbb8777c2e3adb0e4af05ef4dd8fdfb SHA-1: e2cdb3c48d63d099918bed545e9b68eb61cda01a SHA-256: 66e66887eb8d6ceadc599e4654f60fa6ed8c25b37c7a4b6acdd233ba69ccb990
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" lure further supports a malicious intent. The document likely serves as a lure to direct users to malicious sites or to download further malware.

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/mc-the-miner-free-robux-hack-game-hack
    • http://linens.kiev.ua/images/roblox-mobile-hacks-4-free-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/free-roblox-veify-hat_GM431946152.pdf
    • http://linens.kiev.ua/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://linens.kiev.ua/images/how-get-free-skin-in-cs-go-roblox_GM431946152.pdf
    • http://linens.kiev.ua/images/minecraft-bedrock-free-download-pc_GM479516143.pdf
    • http://linens.kiev.ua/images/play-minecraft-online-free_GM479516143.pdf
    • http://linens.kiev.ua/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://linens.kiev.ua/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://linens.kiev.ua/images/como-hackear-cuentas-de-roblox-facil-y-rapido_GM431946152.pdf
    • http://linens.kiev.ua/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • http://linens.kiev.ua/images/roblox-gang-rape_GM431946152.pdf
    • http://linens.kiev.ua/images/roblox-getting-hacked_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-coins-free_GM406889139.pdf
    • http://linens.kiev.ua/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://linens.kiev.ua/images/free-robux-pastebin-easy_GM431946152.pdf
    • http://linens.kiev.ua/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/what-is-a-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://linens.kiev.ua/images/roblox-apk-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003098.bin
5f3db0156728ef3a05b40e1afe8435af33bbe4bc9dae661e4770fa4e2b88a6df
pdf-font-stream PDF embedded font (sfnt) at offset 0x3098 21880 bytes
font_01_sfnt_off000060f8.bin
27182cefe128f33669aad4f315c3797d585d419a84c6f81993dbd45055cbaf6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 19180 bytes