PDF malware analysis — malicious · fb43ab41e6636b37

MALICIOUS

PDF

40.7 KB Created: 2021-05-12 12:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: dc3e06e0ee7ab27bb17cbabe3d02641b SHA-1: 90740d5eecd6d32f937070db2bc2053d7c4aa901 SHA-256: fb43ab41e6636b37a9ea0ff5f55e6bb2e79ab63b14a532d5312c2776558dae38

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be game-related hacks or generators. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/100-hack-coin-master-game-hack In PDF document text
- https://foc.vn/public/upload/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/hacks-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-demon_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-free-download-unblocked_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_003_off00004676.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4676	24572 bytes
SHA-256: `056db073bd68d541412fa6a01efbc0ce308c47fbd326424031db8282435cdbaa`
`font_01_sfnt_off00007d59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D59	17996 bytes
SHA-256: `64ec903919907f2ebe0da0d8bebcfa1491e089a60c1dee67b1131e05f223142b`

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