Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2289abe856b90a…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:37:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c396c42f8affad46e9d08c66c554d906 SHA-1: f5aa691674b56494ea003251c55950b554b945f4 SHA-256: 4b2289abe856b90a2214dfd2dbb86c902278484e37c44e499228a6e64a4a9d98
82 Risk Score

Malware Insights

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

The file is a PDF that displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It also contains an embedded URI pointing to a URL associated with game hacks, further supporting the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-official-fan-page-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000533b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533B 24528 bytes
SHA-256: 3c331cde00db50b4586341954c3bd250de321e587c98150fefa6d213a2a58688
font_01_sfnt_off00008b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B30 18224 bytes
SHA-256: 7172d272c2564e6620d13bdfead72d9093949332c318f086f8b2c295f81971a9

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