Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95b3aa41b764ea5…

MALICIOUS

PDF

52.1 KB Created: 2021-05-31 10:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 284beb92ed2761ab02dfdf828b36a276 SHA-1: 2d918c90be455ea3afda8ee1e46aad4fbe4f73da SHA-256: c95b3aa41b764ea5e09fbd31b0312aa924dea2f98f254aadf254442fbabc7cce
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource that could be a second-stage payload. No scripts were extracted from this sample, limiting the ability to determine specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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.xyz/app/431946152/roblox-crashes-when-cheat-engine-open-game-hack
    • https://tjiko.de/wp-content/uploads/fsqm-files/minecraft-apk-free-download_GM479516143.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/minecraft-build-hacks_GM479516143.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/is-minecraft-free-on-ps4_GM479516143.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-robux-gift-card-codes_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-tiktok-likes-2021_GM835599320.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/best-minecraft-hacks_GM479516143.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/robux-free-com_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-disney-plus-accounts-tiktok_GM835599320.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-real_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-is-getting-hacked_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-coin-master-coins_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-tiktok-like_GM835599320.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/minecraft-free-download-mac_GM479516143.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-roblox-free-hack_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-robux-link_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e1f.bin
7473f556f6240c4e46b18f5ee7280b7ee5acff66d312296dd5ce009a2adddb0c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E1F 27516 bytes
font_01_sfnt_off00008bf8.bin
e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 8132 bytes
font_02_sfnt_off0000a6e5.bin
a1f869d98d6d4e2b1b64e4ff0304eb6e7796c44743fd2fb5d9fddf04cefc2938
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E5 19064 bytes