Malicious PDF — malware analysis report

Static analysis result for SHA-256 c172723f05173d35…

MALICIOUS

PDF

42.0 KB Created: 2021-05-20 00:38:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3560a9ee330085ec6bae429ee9a006ff SHA-1: da65a44002381779f02f552e01f70488d4fa2b36 SHA-256: c172723f05173d357be42d697029f230b1ddb8dda94b2699fe597fcc1cd9d1be
122 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators for popular games like Coin Master and Roblox. The presence of a fake CAPTCHA heuristic indicates a common social engineering tactic to trick users into clicking these malicious links. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or exploit kits.

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/coin-master-free-cards-and-spin-link-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/what-is-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-website_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-root_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_003_off00004807.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4807 25024 bytes
SHA-256: 905cf2f347a38f11e43bdb444e27a03f33ceb5c7f6dabc0640388093cba7ac1f
font_01_sfnt_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 18228 bytes
SHA-256: e7a46ecd3c3d6b5b9fab8b48fe890140ab6e75c9a4df77531e3aad29f6ea7524

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