PDF malware analysis — malicious · cfeb2847434e558d

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 06:22:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: f3a14d7438017ad3548d107c5bd35564 SHA-1: 6d43311e400c4c352b9419f5ebebcd13308b2abe SHA-256: cfeb2847434e558de70355548972ffe2eaf148be4a62228d1253776d34778581

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-codes-not-used-game-hack, which is disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for game-related cheats or currency, likely leading to further malicious content or malware. No scripts were extracted, but the embedded URLs and redirector heuristic strongly suggest a phishing or scam attempt.

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.tw/app/431946152/free-robux-codes-not-used-game-hack In PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/how-to-use-gamesense-roblox-hack_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/blocks-of-war-free-robux_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-robux-ona-computer-fast-2021_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/roblox-games-for-girls-free_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-catalog-items-in-roblox_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/rblx-gg-roblox-free-robux_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/how-to-get-god-mode-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/roblox-salvage-hack_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/free-robux-costing-clothes_GM431946152.pdfIn PDF document text
- http://camphat.com.vn/upload/UploadFiles/files/how-to-get-a-private-server-on-roblox-for-free_GM431946152.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_off000030ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30BA	22184 bytes
SHA-256: `96cc8cc5d7d88ed29c16fefdbd6594858276fbb38c8a81a6dcc10aff1e193f5b`
`font_01_sfnt_off00006203.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6203	18996 bytes
SHA-256: `f2ef840589acbf5544ca5c360f8f850f834bdb07628ffcf9725997a7326c7744`

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