Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb59187c7110ef8…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 21:16:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9b6b98a51bea223900221f197510467f SHA-1: 80dd67be1da8e8e05e34b4d7f980c815e25a5597 SHA-256: cfb59187c7110ef8ae60dc1767b7370ce61281435a2c0a3301675f143a0aeb84
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and free in-game currency, specifically mentioning Roblox and Coin Master. It includes a fake CAPTCHA or human verification prompt to trick users into interacting with malicious links. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-do-you-get-free-roblox-money-game-hack, which likely leads to a further stage of infection or phishing. The document's structure and content strongly suggest a social engineering attack aimed at users seeking game cheats.

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/431946152/how-do-you-get-free-roblox-money-game-hack PDF link annotation
    • http://pia2000.net/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-spins-youthnow_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_off000048a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A1 25380 bytes
SHA-256: a99cf9f04ede8be46ce1e81f192b342ae60874bcd5d16907b6cb58f25dc4b1ae
font_01_sfnt_off00008224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 19064 bytes
SHA-256: 94f9efcc29addd786a26302115b4c31227e6eded102cc07b8eb042232f1d4f5b

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