PDF malware analysis — malicious · 3bfc5604690631cc

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 03:42:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 56398b8086f930e9d2d03f89c4302fa6 SHA-1: 5f4e4bb6bc0c3bc14c0c64b2aa0a14a723e98c4c SHA-256: 3bfc5604690631ccf21af6ecf3d4498d9b579927f6c80ac5d44de48cd7c0bcfc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a call-to-action phrase, designed to trick the user into clicking on a URL that leads to a known malicious redirector. The primary lure is for 'free TikTok likes' or 'game hacks', which is a common social engineering tactic. The document body and embedded links suggest the intent is to redirect users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack In PDF document text
- https://kldcardio.ru/images/minecraft-education-free_GM479516143.pdfIn PDF document text
- https://kldcardio.ru/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://kldcardio.ru/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
- https://kldcardio.ru/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://kldcardio.ru/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://kldcardio.ru/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://kldcardio.ru/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
- https://kldcardio.ru/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://kldcardio.ru/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
- https://kldcardio.ru/images/get-free-robux-generator_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_off00002d24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D24	22628 bytes
SHA-256: `15c8f6e88b36e4b3a4601c181665002c9a43fff37c2d2c00264b2927c1116f30`
`font_01_sfnt_off00005fc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC5	19260 bytes
SHA-256: `26817b4cedfa85687dbcd5cd5fe0b6768af480ef1d18351329c732120202e544`

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