PDF malware analysis — malicious · 17e23c25d2989ed1

MALICIOUS

PDF

46.9 KB Created: 2021-05-13 15:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 6412ef674bb9ada6c58011c77ea40871 SHA-1: ad1a5dbe5f9d498c0634fa4c6dfa8cecb7db349e SHA-256: 17e23c25d2989ed1834622be80ec02214bbcf34647f965cb48975e63fe09514c

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and links to known malicious redirector infrastructure. The primary lure appears to be a "free generator / game hack" for Coin Master, which redirects to a URL associated with malicious activity. The embedded JavaScript likely facilitates the redirection or further payload delivery, indicating a malicious workflow designed to exploit user interest in game cheats.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 5

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 https://netcdn.xyz/app/406889139/coin-master-game-download-free-game-hack In PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-spin-ml_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004bb9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BB9	28560 bytes
SHA-256: `284e4f3250291d2e5bb7d2e43dc301acbb094f7a11468d027f3738b7270c9a0e`
`font_01_sfnt_off00008aa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AA3	2824 bytes
SHA-256: `381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5`
`font_02_sfnt_off00009445.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9445	18548 bytes
SHA-256: `bf0010eea28238cadeb536793d42f80382de1e22dde51f6e5fd1d23f73abc266`

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