PDF malware analysis — malicious · 542fed8dbaa9c99b

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 13:13:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: e81aa8e3090a9dbc4c4fe4657a45a0fe SHA-1: 4572e7f252062bcf2266592a8c31003171131f4c SHA-256: 542fed8dbaa9c99bb06395f3bd38355d1646d00a23c0cb273f10c98bfc1e22dd

82 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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.co/app/431946152/free-cute-roblox-clothes-game-hack PDF link annotation
- https://www.sarsen.net/uploads/files/files/coin-master-free_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/poke-preston-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-rich-accounts-on-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-get-free-robux-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/tiktok-free-jazz_GM835599320.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-mster-free_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/bux-free-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/robux-club-free_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/give-free-robux_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_off00002dd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DD5	22432 bytes
SHA-256: `e694254767b84850d0e2653bfa2fdb08e5db41b6f28bdb894c96eef037c65298`
`font_01_sfnt_off00005fdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FDD	19060 bytes
SHA-256: `afa7b8c1bca9b0b439d5f26acb769b460b2287cd71e820183d2a7926d1fccb31`

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