PDF malware analysis — malicious · 9b95b405abd7a80e

MALICIOUS

PDF

227.7 KB Created: 2021-06-21 23:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 505968e4f62ac99690256253513dccbf SHA-1: 4d94dbb51177501135f2827ca74448ff0bf2305d SHA-256: 9b95b405abd7a80e91e607bdacb0cc03fc6a5d55d14167bb90c37d547540d622

250 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating social engineering lures, including a fake CAPTCHA, a game hack generator, and a download button. The primary lure directs users to a known malicious redirector URL, http://netcdn.co/app/1094591345/pokemon-go-free-150-game-hack, which is likely intended to deliver a secondary payload or lead to further compromise. The document's structure and content suggest it is designed to trick users into executing malicious actions.

Machine Learning

Nyx PDF Classifier clean score 0.0118

Heuristics 7

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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
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 http://netcdn.co/app/1094591345/pokemon-go-free-150-game-hack In PDF document text
- https://limebug.com/media/storage/editor/files/_GM479516143.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/how-to-hack-roblox-jailbreak-money-2021_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
- https://limebug.com/media/storage/editor/files/hack-for-mac-roblox_GM431946152.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.

Filename	Kind	Source	Size
`stream_023_off000322a7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x322A7	25576 bytes
SHA-256: `0cba1b7d4f632bd84ce47666f33b9ed9db1ae41f81b146f47ee77cd6768872da`
`font_01_sfnt_off00035eaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35EAA	18768 bytes
SHA-256: `92e3eb50c0610d04d9e03663a0bf5576a39007881ff60832fea647bf679c2f8b`

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