Malicious PDF — malware analysis report

Static analysis result for SHA-256 8662b0811d44672b…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 23:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 501bf28a88e89912105bc78572968352 SHA-1: 59d8e5feaf1b6a331c7907c8e18504416998d558 SHA-256: 8662b0811d44672b2514f2baac9f220018a7b18a4cf934db05bb77be1c404187
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA or human verification prompt to trick users into clicking a malicious link. The primary link, https://netcdn.tw/app/431946152/free-robux-hack-no-verification-2021-game-hack, is presented as a "free Robux hack". The document body and embedded URLs strongly suggest a social engineering lure for a scam or potentially malware distribution.

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/free-robux-hack-no-verification-2021-game-hack PDF link annotation
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pubg-uc-whatsapp-group_GM1330123889.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000502a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502A 25312 bytes
SHA-256: ce0547e68db1fcf879415a8c94f209da4ef4ad86fecd5f0235cb412059509519
font_01_sfnt_off00008998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8998 19172 bytes
SHA-256: 077b013aac69304db3aa165fdb6906aed62afb84e588e847fef8ee432996aea7

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