PDF malware analysis — malicious · c55fccb2edd2a24d

MALICIOUS

PDF

32.2 KB Created: 2021-07-21 01:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 2daec9488f1032cb918c444475c120cf SHA-1: a4351ea39ff3327d217e24c7f598e9e3eddb7418 SHA-256: c55fccb2edd2a24d89890fdecea57ef319adf88ff1727f42762530afbaea9a8c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and hosts further PDF files, likely as part of a phishing or scam campaign. The document body explicitly mentions 'Free Spin Link For Coin Master' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a lure for in-game currency. The embedded URLs are designed to lead users to potentially malicious content, and the ML classifier strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/406889139/free-spin-link-for-coin-master-game-hack In PDF document text
- http://museumkk.ru/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://museumkk.ru/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
- http://museumkk.ru/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- http://museumkk.ru/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://museumkk.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://museumkk.ru/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://museumkk.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://museumkk.ru/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://museumkk.ru/images/free-robux-scams_GM431946152.pdfIn PDF document text
- http://museumkk.ru/images/free-minecraft-website_GM479516143.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_off000029c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x29C3	22756 bytes
SHA-256: `f34a089e26c94a26059801173dea16f865c092370e48364287f5a7b4056e1110`
`font_01_sfnt_off00005c8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C8B	18056 bytes
SHA-256: `b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d`

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