Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c83de3239d5c26d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 22:16:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 00d34bcbe09eca0e2ddf4365f5b6f76e SHA-1: 37beca883e3c1d2d700b1e3d32b341c8338bc29b SHA-256: 0c83de3239d5c26de961c479aeaec39615b062bb579315e60ef496d8eafcf0de
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, directing users to external websites offering game hacks and free currency. This is a common social engineering tactic to entice users into downloading potentially malicious files or executing further stages of an attack. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a distribution vector for malware or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/how-do-you-get-roebucks-for-free-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-android-app_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pokemon-go-free-event-box-april-2021_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/is-tiktok-free-on-voxi_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-apk-2021_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_off00005188.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5188 25128 bytes
SHA-256: 6de6d08f6a17fa45368e84b8d43db15965917ac2c783b828598e9cfd423f1f87
font_01_sfnt_off00008b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 18572 bytes
SHA-256: 9b0926f851b5352a1c94160dd5570857b20d788284ad3dea1803889ab4bbc101

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