Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecc12855b2db5bc…

MALICIOUS

PDF

41.4 KB Created: 2021-05-10 18:06:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a4825663c7801c9850fd860d54808765 SHA-1: 2b6549bcda476c7148f64d83f607f832146c2174 SHA-256: eecc12855b2db5bc45e813a7f3550a0d49aab9d9e96618638150c3e2226da45b
122 Risk Score

Malware Insights

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

The PDF file contains a high-confidence heuristic indicating it links to a "free generator / game hack" lure, presented via a fake CAPTCHA. This is designed to trick users into clicking malicious links, likely leading to further compromise. The primary IOC is the external URI pointing to a game hack generator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/instagram-coin-master-free-spins-game-hack PDF link annotation
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-server-hacks_GM479516143.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_003_off000047d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D3 24176 bytes
SHA-256: 7420cd23cb7b3fdc3145e2347ca092e32cbabc7d28b543da0dbae059197903d1
font_01_sfnt_off00007f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 18432 bytes
SHA-256: 2b49b18ea8e6af85f9d01b8086051709ac83a6aa6280f9f1047115a4054a4512

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