PDF malware analysis — malicious · 94522b84ab445f25

MALICIOUS

PDF

47.6 KB Created: 2021-06-01 15:56:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: a17b8aaea79091c45a836d8e226c7f08 SHA-1: 752496f41dd5aba458d4c9def30b7802949a6f31 SHA-256: 94522b84ab445f2535ec09d2a74844c2650c747b5ef6566c8a9a6280668abd96

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that appear to be part of a link farm, many of which are SEO-optimized PDFs related to game hacks and cheats. One critical heuristic identified a link to a known malicious redirector infrastructure, suggesting the document is designed to lead users to potentially harmful content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 5

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/how-to-get-free-items-in-roblox-camping-game-game-hack In PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/robux-hack-generator-no-veriy-100_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-cheats-com_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generators-that-actually-works-2021_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-not-for-sale-roblox-templates_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/dragon-ball-x-roblox-hack_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-phantom-forces-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/youtube-roblox-hack-by-rox-exploits_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/fly-hacks-roblox-2021_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-hack-tool-robux-and-tickets-download_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/free-sprite-shirt-roblox_GM431946152.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-jojo-blox-hack-script_GM431946152.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_off0000521a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x521A	25096 bytes
SHA-256: `1d3c5a6d2ac81be106c411b71381d32c8b570955c848eaf41d4c5b120b0a68df`
`font_01_sfnt_off00008a69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A69	2820 bytes
SHA-256: `972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714`
`font_02_sfnt_off00009409.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9409	19288 bytes
SHA-256: `431de20f4fce6dfc3a867d3044b5f5ccd3ac1714ceec996fd1c9811340b2a192`

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