Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28a99bab18f2a4d…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 05:27:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1423a8e295bee59fbb6bd5b2855df2b1 SHA-1: 84c363229e82981bdcf7eb62ec5ad6623169ef05 SHA-256: f28a99bab18f2a4dc6ed1f4cb85b4896cd4aa82c5d3f6498a66f3dea927b11e6
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 a website offering game hacks. This is a common social engineering tactic to entice users to click malicious links. The embedded URL points to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/no-human-verification-hack-for-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-adder_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-jackets-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E00 26340 bytes
SHA-256: 4be83f5c18882ed8338613882bfc58b97f9cf30b25713f3859dd9ee526c1e9e2
font_01_sfnt_off000089b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off000094bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BC 18416 bytes
SHA-256: e2def261e9c0d489920ca96f0bc353b112c40b7f6e818ee8e160ca61827c750c

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