PDF malware analysis — malicious · 39070a082abc0b04

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 14:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 705c38a9c74968445105fc1f688c1596 SHA-1: 173893105878427675e7f3586e6e3482a960ba20 SHA-256: 39070a082abc0b04e641b62719b07dd1fa49840ac36226be9a9b7694c1dcf51e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting users interested in Roblox items. The document body and embedded URLs reinforce this lure, directing users to `http://netcdn.co/app/431946152/best-free-roblox-items-2021-game-hack`. Although no scripts were extracted, the overall structure and the nature of the lure suggest a phishing attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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/best-free-roblox-items-2021-game-hack PDF link annotation
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/shadow-raid-loot-cheats-roblox-notoriety_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-clothes-on-roblox-on-your-phone_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/tiktok-watch-free-movies_GM835599320.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master--hack_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/pokemon-go-free-zip_GM1094591345.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-btools-from-cheat-engine-roblox_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/hack-coin-master-iphone_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_off00003169.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3169	21808 bytes
SHA-256: `5d950f8f0e842194c48cf9abf522f3c02c21000cea794f9c974567615aca5a5a`
`font_01_sfnt_off000061b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61B0	19416 bytes
SHA-256: `a6214722ad3f2fc2ba9f035181d8cdcd4cbeb3aeeda8d5caf3ef83f12aff742d`

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