PDF malware analysis — malicious · bdb5810a18da45c7

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 00:54:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 81d43c4d2ea5975a40f648af485ae023 SHA-1: d2b7f00aca1dceac537172647a8e517193165a3e SHA-256: bdb5810a18da45c75ab2d02c4fec77e540569951c9072d221b0940e86ee14366

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.tw/app/431946152/win-free-robux-game-hack PDF link annotation
- https://htdvn.com/public/upload/files/free-long-hair-roblox_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-hack-stats_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/robux-hacks-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-robux-claimgg-codes_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/t-shirt-hacker-roblox_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-cheat-engine-bypass-2021-super-power-training_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-robux-claims_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-get-free-robux-instantly-free-robux-hack_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/give-me-robux-now_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/tiktok-free-food-vending-machine_GM835599320.pdfIn PDF document text
- https://htdvn.com/public/upload/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-guess-hack_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-get-free-robux-no-clickbait-2021_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_off000030ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AC	22000 bytes
SHA-256: `409af984812085520bc984d938a402d9d67d088e2e8418b9ffacd7d79986c6e0`
`font_01_sfnt_off0000612c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x612C	19036 bytes
SHA-256: `866c875b7ada575fda7e0b2d16b4e3d455f2c28d19dc14b305271f934871ca62`

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