Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa9f3e471893cdc…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 05:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5695fca5c4c47a44eb51352320a5e70 SHA-1: f6a36260fa46fa2d338850e122545db15ab076b8 SHA-256: 3fa9f3e471893cdc053540d99daef50680c534aaf4da5a66e7a9bdcdc5f2fe15
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that likely serves as a lure for game-related cheats or hacks. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/coin-master-free-coins-and-spins-today-game-hack
    • http://slims.abulyatama.ac.id//repository/free-op-minecraft-servers_GM479516143.pdf
    • http://slims.abulyatama.ac.id//repository/how-to-actually-get-free-robux_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/coin-master-35-2-hack_GM406889139.pdf
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/pokemon-go-free-daily-spawn_GM1094591345.pdf
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-xyz_GM406889139.pdf
    • http://slims.abulyatama.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdf
    • http://slims.abulyatama.ac.id//repository/coin-master-2021-free-spins_GM406889139.pdf
    • http://slims.abulyatama.ac.id/repository/roblox-pics_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/free-robux-link_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/pokemon-go-free-online-play_GM1094591345.pdf
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://slims.abulyatama.ac.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/hack-roblox-players_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/how-to-get-pokeballs-in-pokemon-go-free_GM1094591345.pdf
    • http://slims.abulyatama.ac.id//repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005242.bin
69145eeb646790d337acb3444cd9ae6d9f43c6d07d453fe06db3939f57a8aa1c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5242 24872 bytes
font_01_sfnt_off00008ab3.bin
98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB3 2896 bytes
font_02_sfnt_off0000949a.bin
4e9460ee7c922f2330eb91d2df2ab210a384988491c8b06196f83513902e5b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x949A 18240 bytes

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