Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03591e83fcbd3b7…

MALICIOUS

PDF

43.7 KB Created: 2021-05-10 21:08:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ebcb184f53446ac844bea29812ee2b80 SHA-1: c86c2c829eba7e710f2877cffecba90f12e49215 SHA-256: b03591e83fcbd3b7dc97d683b1f461bd5b24acbe6d5030588337454b4ef4aeb1
122 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to the URL https://netcdn.xyz/app/431946152/wahoogaming-co-free-robux-game-hack. This, combined with the 'Fake CAPTCHA' heuristic, suggests the document is designed to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/wahoogaming-co-free-robux-game-hack PDF link annotation
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/village-coin_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_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_off00004abd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABD 25772 bytes
SHA-256: 7e04f2ac7a1c3807ea075f16ed911d2c6716e5498bde8881d536e376528cf11a
font_01_sfnt_off000085e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E9 19272 bytes
SHA-256: 78de909b7ffb92602eadaeed37aeb712efe7a44911c114e8956161378fc8ed7d

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