PDF malware analysis — malicious · 4514cb3e50b73219

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 14:48:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 3cf2a2bac3328778c163f69cafad3511 SHA-1: c35043a833d67b34ae2cb187a827170ea9edae0e SHA-256: 4514cb3e50b73219db929b86d10ecd40e3de2dea108cdbeb859966c16c1175ce

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 0.9864

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 https://netcdn.online/app/431946152/free-robux-easy-game-hack PDF link annotation
- https://www.advancissurgical.com/uploads/files/files/robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-picture_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/easy-robux-generator_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/get-free-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-roblox-executor_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/robux-for-offers_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/blox-land-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
`stream_004_off000051d0.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51D0	26492 bytes
SHA-256: `032644eee34256dcb32f86f6c3ba2d18d88bf84e917d48db48e02bbe23320ae6`
`font_01_sfnt_off00008f3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F3E	18420 bytes
SHA-256: `93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e`

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