Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bba59ece5122cf2…

MALICIOUS

PDF

32.7 KB Created: 2021-06-28 09:11:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 70e220a3e2fea578886e937898c0f100 SHA-1: edcd1957b8bff1ea9ffcc3821681a2c2aca4bd83 SHA-256: 3bba59ece5122cf21536765395c2f311b1ddbfa43a46b6640c0ce26a5ad64bf0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains numerous links and references to game hacks and free Robux, indicating a social engineering lure. The presence of external URIs and a high ML classifier score suggest malicious intent. The document body and heuristics point towards a phishing attempt to trick users into downloading a malicious payload disguised as a game hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-robux-weebly-com-game-hack
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/heurne-free-robux_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/editthiscookie-roblox-hack_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/get-a-profesional-roblox-game-cover-for-free_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/cheat-engine-64-roblox-2021_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/hello-neighbor-free-play-roblox_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/noclip-roblox-hack_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/piano-hack-in-roblox_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-code-for-roblox-unicorn_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/hack-roblox-robux-2021_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/who-did-i-get-free-robux_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-minecraft-texture-packs_GM479516143.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/is-roblox-downloadable-on-ps4-for-free_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/roblox-dubliezieren-hack_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/roblox-parkour-hack-8-2021_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-roblox-source-dll_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/fnaf-roblox-free-items_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/infinite-robux-hack-2021_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/howt-to-hack-roblox-with-cmd_GM431946152.pdf
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/crate-clicker-roblox-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_off00002ad0.bin
82b09180750d1764baae1dbac1ed87504a75e83697bdf68565c0847fa6ae53c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD0 21440 bytes
font_01_sfnt_off000059df.bin
856564b88e212c78749c1bc3bf7bd0aa1bc55b10f0062675eb0a131edf87c47d
pdf-font-stream PDF embedded font (sfnt) at offset 0x59DF 19428 bytes