PDF malware analysis — malicious · b14b5e9e2a3bf6d7

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 05:45:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 36914ec752ce7bacd27645afd1e9e0a8 SHA-1: 6621fa8ad688061a674ee8812aac87da626d09ca SHA-256: b14b5e9e2a3bf6d7b1ed54daaaba7ca4343755e5434c612455d6853488833dd5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary malicious URL identified is http://netcdn.tw/app/835599320/tiktok-follower-bot-free-game-hack, which is associated with a 'free generator / game hack' lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection to malicious content, likely involving client-side execution.

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/835599320/tiktok-follower-bot-free-game-hack In PDF document text
- https://loba.com.vn/public/upload/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robux-free-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-cheat-indetectable_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robux-hack-tickets-net_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-assassin_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-10-000-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-shirt-templates-on-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-you-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-ban-people-on-roblox-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-games-working_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-live_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-the-scary-elevator-red-keys-locations-cheat-sheet_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_off0000323d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x323D	22504 bytes
SHA-256: `419dc9e186d4af76ddcc5b44318003e09db689d678ccfac64d22f4b4a1717ef9`
`font_01_sfnt_off00006471.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6471	18428 bytes
SHA-256: `affadc9525e73c214b04e52c3329ac878b5dc0447f7849dc6b07f5a35e49d9d0`

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