PDF malware analysis — malicious · e752412bc88a8ed4

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 06:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 5e0576c3848259b83a564efa4b9d68a2 SHA-1: 26b27c5ed840933aae3efdb9318ca036b3bb6ab1 SHA-256: e752412bc88a8ed4ef68da3db3022e49719ab33137d0c4fc8a65a832cec938c7

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free spins'. The document body and heuristics indicate a lure for users interested in free game-related content, which is a common tactic for distributing malware or leading users to phishing sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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/coin-master-free-spin-and-coins-links-game-hack In PDF document text
- http://eurosystemssrl.it/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
- http://eurosystemssrl.it/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- http://eurosystemssrl.it/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/is-minecraft-free_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
- http://eurosystemssrl.it/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- http://eurosystemssrl.it/images/robloxmatchcom-free-robux_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
`stream_002_off00002b4d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2B4D	23532 bytes
SHA-256: `16d9dcc405188465963a18597f491701c4eb97ee8c5a44c4f9a190576db6e363`
`font_01_sfnt_off0000606c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x606C	18228 bytes
SHA-256: `ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2`

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