PDF malware analysis — malicious · de93441d3afb5a07

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 08:58:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 9244f256a72c4fa6b88d6b6e50be98f6 SHA-1: d611a2ed7504c0f72d571484b55867a8e6125d41 SHA-256: de93441d3afb5a077cb92263b4b2d5362b3da68d4a366adbbee7585175bd08bc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded URI and multiple other URLs that are likely part of a lure to trick users into downloading malicious content or visiting phishing sites. The document body and heuristics suggest a focus on game-related cheats and currency, a common theme for social engineering attacks. No scripts were extracted, but the presence of external links indicates a potential for second-stage payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spins-reddit-game-hack In PDF document text
- http://achauco.vn/public/upload/files/roblox-login-hack_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-skins-download-free_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
`stream_004_off0000522b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x522B	25416 bytes
SHA-256: `36ac44f2b9d776db419bcf7dc8a8ffc7b11ccdaf18ba17bcba1d0c719eadf2d6`
`font_01_sfnt_off00008b68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B68	18060 bytes
SHA-256: `4e5c9128e0a9fa60b92eedd1f31c2e3424560d9f599dff1a3da25a642fd73c7b`

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