PDF malware analysis — malicious · d1f898a30e01a552

MALICIOUS

PDF

32.6 KB Created: 2021-06-25 13:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: fef92cb34f2afb1b4191ad0f4b1ab198 SHA-1: 2729964fc929e717dbce6f9d7a45a70a9402afae SHA-256: d1f898a30e01a5521d7bce37e9efdb7153dd6172431022a71cea614d53b2d8e3

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 0.9824

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/robux-page-game-hack PDF link annotation
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/hackers-that-hack-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-bux-free_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/airport-in-roblox-free-download_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-speed-hack-jailbreak_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-robux-hack_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_off00002a88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A88	22184 bytes
SHA-256: `62e5a53a29c291d85b7c55cc02b7317a146a87c7e2c7119def39691cf7e84dda`
`font_01_sfnt_off00005b8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B8C	18708 bytes
SHA-256: `85351036e61ce7a0f3d06f8f5c7cd377a9c3d874a20f377d4e526a0d18450229`

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