PDF malware analysis — malicious · fa958c354dd6086a

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 23:51:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 5bdd717650493c8110bdf9ad1bab038e SHA-1: faa3c841ffde12151f8cc7a556e773697f8175c1 SHA-256: fa958c354dd6086ae4614d3eb91cef93ef7f352e4313254d30c669600365aa71

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and links to known malicious redirectors, specifically advertising game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/coinmasterfree-game-hack, is designed to lure users into downloading further malicious content or visiting phishing sites. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute further malicious code upon opening.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coinmasterfree-game-hack In PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/best-hacks-for-frappe-roblox_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/boy-clothes-free-roblox_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/black-t-shirt-free-roblox_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/pokemon-go-free-yanmega_GM1094591345.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-please_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/hack-para-tener-robux-como-tener-robux-gratis-enderrobux-117_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/roblox-prove-cheat-engine_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-and-tickets-in_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/hack-coin-pro-coin-master_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/admin-script-roblox-hack_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/proprofs-free-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-2021-easy_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
`font_00_sfnt_off000031bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31BB	22600 bytes
SHA-256: `306cdbb552292817ff81c3c50178b4fc1912fe9d21cda03dac1d6f453d0a20b6`
`font_01_sfnt_off000063fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63FC	18092 bytes
SHA-256: `e3b824c700fc1afb9be61c0fda879df8bb3fefe3698910b387f7b25b5267b414`

Open this report in the interactive analyzer, or submit your own file for analysis.