PDF malware analysis — malicious · 282b0d28f4356ba7

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 21:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: be52b360050e5109ebd0f067726d6119 SHA-1: 35e4cf1472c1940698c997d90517fd589ead68e4 SHA-256: 282b0d28f4356ba79db0050c71bf08ddd9a07d5be0d9b2064b7ebe0eda4d1912

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game hacks and currency. The primary malicious link, http://netcdn.co/app/431946152/how-to-get-free-robux-please-game-hack, is designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user interest in free in-game items to redirect them to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/how-to-get-free-robux-please-game-hack In PDF document text
- https://foc.vn/public/upload/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/pubg-uc-and-generator_GM1330123889.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-free-robux-in-roblox-2021-proof_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-roblox-gear_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-memeber-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-admin-commands-hack-download_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-apk-link_GM406889139.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_off00002ec0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EC0	22140 bytes
SHA-256: `210e27d0537fb9eba539c282ad3ecc50333e090a7d674454497e1774760b957c`
`font_01_sfnt_off00005f8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F8A	19212 bytes
SHA-256: `ea72f48bae85273f02320cca8a19e11e098d7b9890905ce34a9adc7c3b588e90`

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