PDF malware analysis — malicious · 1830c61a403e5621

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 20:44:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8c1309ebfa3b77b173769d8429d01ea9 SHA-1: 1a76ba5135c55c62cca3645933ceb54ba6411f7b SHA-256: 1830c61a403e5621262a5ead3d4ebad2a9b2c7c8fff322a18b7cfb1f72800384

90 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
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
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 http://netcdn.tw/app/406889139/free-spin-coin-master-2021-game-hack PDF link annotation
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-pins_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/roblox-free-limited-faces_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-cheat-on-boxing-simulator-2-roblox_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/devil-roblox-hack_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/jailbreak-roblox-free-money-glitch_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/robux-hack-100-real_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/wich-are-the-best-free-level-7-exploits-for-roblox_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/easy-roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-roblox-characters_GM431946152.pdfIn PDF document text
- https://cheryco.ir/assets/public/js/uploading/files/free-robux-no-password_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_off00002ea0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EA0	21824 bytes
SHA-256: `1c82d70a0b45e5da8e3891b93b6a81cc68c9035dd611c1b23db6f3543502c10c`
`font_01_sfnt_off00005ec4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EC4	18576 bytes
SHA-256: `3af2a790f1bd7a3afb398ecfc348a5559e4db05f514a45e9361d5c46150add68`

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