PDF malware analysis — malicious · 51802fc46da4a757

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 18:19:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 868111495587265a57aae2c69a967c39 SHA-1: df04f5658316ea650e8ce981c8472605c78aed27 SHA-256: 51802fc46da4a757cf0438b6ae5af9b34a8f3ee21950a04e7f6f9f73b8ba6738

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 0.9507

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.xyz/app/431946152/free-roblox-accounts-game-hack PDF link annotation
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-roblox-clothes_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a19.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A19	24556 bytes
SHA-256: `e433a25ab1c6259f30f9917100dbe73dc3cc5e1f4ce0bb81de54406f4d15f077`
`font_01_sfnt_off00008297.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8297	3464 bytes
SHA-256: `8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20`
`font_02_sfnt_off00008ecd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ECD	18192 bytes
SHA-256: `9af8fc399b7603ded65a47756b8d28ab9f279dafa7c0fe2cd6f7ecbc085cbebe`

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