Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ff0749680905a4…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 09:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f778daa9bf4aad7e1452ded8f6b5fa23 SHA-1: 314077c5a72af4042fbd8c29d237f5d58939c211 SHA-256: b6ff0749680905a45a5057f63644557a5a4d7341df02c4de9ce22f94188c6a32
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and 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 0.9832

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-no-survey-no-download-no-human-verification-2021-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/why-does-roblox-shut-down-when-i-use-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/adopte-me-hack-project-alpha-300-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-rocitizens-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-downloads-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/como-hack-coin-master_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_off00005293.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5293 25268 bytes
SHA-256: a45e2c8a7543b44b44f27d80063e95543429cf6eda84bbe70749dbc1561d5893
font_01_sfnt_off00008d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D20 20136 bytes
SHA-256: 6fb10236c0dbd2ee9a92c74fdb103930ac721b459f50e205f36b123222b19cbc

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