Malicious PDF — malware analysis report

Static analysis result for SHA-256 c591b0fb87907004…

MALICIOUS

PDF

34.7 KB Created: 2021-06-17 23:10:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62b2f76ed50bd6a7937a2438ea1daa87 SHA-1: 7637a924abdb01bcdf881b7cefbebafe3b33246b SHA-256: c591b0fb87907004d56f132953812689065bdec2efafdf85dfaa5d8f0a7c6b25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a lure for free game-related items, such as Roblox gift cards and Minecraft downloads, to entice users to click on embedded links. The presence of multiple URLs pointing to potentially malicious content, combined with a high ML classifier score, indicates a strong likelihood of malicious intent. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, possibly to download and run further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-roblox-gift-card-codes-2021-live-game-hack
    • http://svadba-moda.kg/images/how-to-hack-roblox-to-get-free-items_GM431946152.pdf
    • http://svadba-moda.kg/images/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://svadba-moda.kg/images/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://svadba-moda.kg/images/how-to-hack-roblox-accounts-2021-using-cmd_GM431946152.pdf
    • http://svadba-moda.kg/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • http://svadba-moda.kg/images/minecraft-free-trial_GM479516143.pdf
    • http://svadba-moda.kg/images/roblox-hack-2021-jailbreak_GM431946152.pdf
    • http://svadba-moda.kg/images/free-roblox-giftcard-code_GM431946152.pdf
    • http://svadba-moda.kg/images/free-minecraft-gift-card_GM479516143.pdf
    • http://svadba-moda.kg/images/free-coin-master-coins_GM406889139.pdf
    • http://svadba-moda.kg/images/cheat-enginge-how-to-make-roblox-not-crash_GM431946152.pdf
    • http://svadba-moda.kg/images/minecraft-bedrock-free_GM479516143.pdf
    • http://svadba-moda.kg/images/roblox-speed-hack-2021_GM431946152.pdf
    • http://svadba-moda.kg/images/free-us-robux_GM431946152.pdf
    • http://svadba-moda.kg/images/roblox-cb-ro-hack-script_GM431946152.pdf
    • http://svadba-moda.kg/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://svadba-moda.kg/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://svadba-moda.kg/images/noclip-hack-in-roblox_GM431946152.pdf
    • http://svadba-moda.kg/images/free-robux-gen-no-verification_GM431946152.pdf
    • http://svadba-moda.kg/images/robux-hack-exploit_GM431946152.pdf
    • http://svadba-moda.kg/images/minecraft-p
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ead.bin
416f60d0611b59fffc4d0623ad637e8d02634e66e5c5843e848bf68533f83ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAD 22656 bytes
font_01_sfnt_off00006192.bin
871e66adcb63e2c618ca555e7f1099102c23c334cad42ef2ef8049532c9a8dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 19380 bytes