PDF malware analysis — malicious · 879feb5b67730669

MALICIOUS

PDF

34.7 KB Created: 2021-07-13 06:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: dedf25240e5f8ee87b739c55296627e3 SHA-1: bb037cb995aa441180ea5bc0caba5cf21009af57 SHA-256: 879feb5b677306698fee5c5186a686e27348fe7b8b9b7a2b92b6637fb3e64286

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/roblox-robux-hack-generator-game-hack. The document body and heuristics indicate a lure related to game hacks and generators, suggesting the primary goal is to redirect users to potentially malicious sites. No scripts were extracted, but the embedded links and redirector findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/431946152/roblox-robux-hack-generator-game-hack In PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/sop-free-private-server-roblox_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/descargar-hack-de-fly-exe-para-roblox_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/mcpe-hacks_GM479516143.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/destroy-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/easy-roblox-today_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/robux-generator_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/roblox-robux-hack-mega_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/plugin-free-robux-download-pc_GM431946152.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
- https://www.e-learning-mts-sirojulhuda.com/__statics/gudangsoal/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off0000346d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x346D	21304 bytes
SHA-256: `aa602e3287e75987fcffe4e883bf65dfe482e086d068eb236db52b589a87ffa2`
`font_01_sfnt_off000062de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62DE	18900 bytes
SHA-256: `e419110d4009e271ea11aee689c1aa7fe2ca079d33d0815bd6a59eb0f8b0c4e6`

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