PDF malware analysis — malicious · ef63d07db78f4ba3

MALICIOUS

PDF

49.3 KB Created: 2021-05-16 11:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 8408a448905bdb06c156316f93ae4940 SHA-1: 69e83fd3bccc4160e06a7a3f4bb3c66ff38d2b32 SHA-256: ef63d07db78f4ba3bccece382d68dc407ba130494c86d90f11c078d3f1545fe5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks' as a lure. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate this malicious intent. While no scripts were extracted, the document body and heuristics point to a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

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.xyz/app/431946152/complete-offers-for-robux-game-hack In PDF document text
- https://www.advancisveterinary.com/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/rbx-hut_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/minecraft-education-free_GM479516143.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/robux-download_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/roblox-free-models_GM431946152.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.advancisveterinary.com/uploads/files/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000048e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48E8	24984 bytes
SHA-256: `82f476b8899b8bf46c8e37ce4658d9de41e0eacbe997963c38d02cda3d2bfdd7`
`font_01_sfnt_off00008298.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8298	8132 bytes
SHA-256: `e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787`
`font_02_sfnt_off00009d85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D85	18628 bytes
SHA-256: `27a538390e2791e01883ed63320744732627358ab115b0534bac8ed790d0f8b6`

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