Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da929b90e5c6cca…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 10:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8271e22409e859cbbcd9e1a3ca2c7283 SHA-1: 9373f14b5c5217fdf8fadf98bad6bd64087b2dc0 SHA-256: 2da929b90e5c6cca96944f450a652b92b908f3fa0485315b6619fff073ac0b71
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/431946152/www.get-free-roblox.com-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pokemon-go-free-12-km-eggs_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pokemon-go-free-8-km-egg_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.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_off00004f92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F92 25092 bytes
SHA-256: d4c81c9cb6297499bad9ec6846a2eda7816f7b4cb76c419bf1d8fc4aa5bf0b07
font_01_sfnt_off000089bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BF 19028 bytes
SHA-256: ef11b7180821cc0bd6edac0e829f3423ff484d9f80c26fe794102fff7cd76136

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