PDF malware analysis — malicious · a88074778cb745cb

MALICIOUS

PDF

32.5 KB Created: 2021-07-19 21:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 3e0968d737451259e92d8bdad9a91297 SHA-1: d20e94868ff75575d56bc1c8b12d50610b731ae0 SHA-256: a88074778cb745cbcd2f666395e31527403a14fbddf2a06b3ac27fcee7e3a7a6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and 'game hacks' to entice users into clicking a link. The primary malicious URL, http://netcdn.tw/app/431946152/free-robux-generator-no-human-verification-2021-game-hack, is likely a redirector to a further malicious stage. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or exploitation of PDF vulnerabilities to download and execute a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/free-robux-generator-no-human-verification-2021-game-hack PDF link annotation
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/minecraft-free-no-download_GM479516143.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_off00002abb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2ABB	21392 bytes
SHA-256: `4a0714edd0b1bf051d130e63eb62f8f1c63f65194bf3b0bf8cb00c4ac989deff`
`font_01_sfnt_off0000597a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x597A	19448 bytes
SHA-256: `c4f235c6325a062dfb1dc9d53c980481f8635b4baeb4de16fff816f4c5634972`

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