PDF malware analysis — malicious · 10f54aca0d0a9083

MALICIOUS

PDF

48.1 KB Created: 2021-05-16 09:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 8c4ac6373bc557a39b0e7aad57c08312 SHA-1: 68e6c305a3e501c1b68b90fdd52c345b00be9565 SHA-256: 10f54aca0d0a908324029dc204b6b9c9f9d8e6ac8f46e2645d8766ff8bb4b64f

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on game hack generators and free currency sites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external URLs indicate a phishing or scamming attempt. The document body, though partially corrupted, contains keywords related to game hacks and free currency, reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/406889139/coin-master-free-coins-link-2021-deutsch-game-hack PDF link annotation
- https://www.astrospace.com.tw/upload/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robux-fun-hack_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-get-free-minecoins-in-minecraft_GM479516143.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_off00004a39.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A39	25484 bytes
SHA-256: `6b8b05dbde6e6e9b98d93eed3f90eff1afe47bc7269cb168337de09215ff569e`
`font_01_sfnt_off000083e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83E3	8676 bytes
SHA-256: `e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468`
`font_02_sfnt_off0000986e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x986E	18756 bytes
SHA-256: `cee569ad26c6995f0462545108d280bf76b2c9dfe620e2643f0a7a8ec4db527a`

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