PDF malware analysis — malicious · d4780ac42b16a8fb

MALICIOUS

PDF

34.5 KB Created: 2021-06-21 00:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 38db2548ab6952f9bd8f139a83ae4489 SHA-1: be163b345e555b1a25e7c8b449e5e12f6e334ac6 SHA-256: d4780ac42b16a8fbb033b65968ab635679e535c9e3639cb055a1e2f086f70880

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains multiple embedded URLs, including a primary one pointing to 'netcdn.co', which likely serves as a redirector to malicious sites or phishing pages. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules indicate a game hack redirect lure. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to lead the user to a compromised external resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/roblox-games-with-free-boombox-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/nike-shirt-roblox-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-use-cheat-engine-64-on-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/facebook-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/best-hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/body-building-roblox-weightlifting-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/bad-minecraft-free_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
`stream_002_off00002d93.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2D93	22612 bytes
SHA-256: `d883d5ac0797e3e7936692eea178dad0273e5f46b395d53f7009e790d9fb8e82`
`font_01_sfnt_off0000605d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x605D	19496 bytes
SHA-256: `1fe97cacaf87faaf7e87019df11dc5da97cf6ecddb8fd4c97aefa44281928813`

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