PDF malware analysis — malicious · 472ce8aac623522b

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 16:18:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 57d9f1b4923c8b59f8c850108b7b247e SHA-1: f11865e8da2bbf21da73b1659a912238a9d0434f SHA-256: 472ce8aac623522b2503221830afcd1016fb7917f7189a2e1518eb1c47073795

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which point to files hosted on bibliopolis.be, suggesting a link farm designed to distribute malicious content. The document body and embedded links indicate a lure related to game hacks, specifically for Roblox. The presence of a 'download button' heuristic further supports the intent to trick users into downloading files. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 4

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
External URI info PDF_URI

PDF contains an external URL action
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.tw/app/431946152/hack-para-ro-ghoul-roblox-2021-rc-game-hack
- https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-free-commands_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/rise-of-nations-roblox-cheats_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/free-promo-codes-on-roblox_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/one-piece-millenium-tutorial-roblox-get-free-evil-fruit_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/free-tiktok-likes-no-survey_GM835599320.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-money-in-roblox-vehicle-simulator-2021_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-kindle-fire_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/www-free-robux_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/caught-my-mom-cheating-in-roblox_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-with-roblox-redeem-card_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/fortnite-skins-free-for-roblox_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/www-roblox-cheatuscom_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/free-robux-without-survey-or-verification_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/download-minecraft-free-hiapphere_GM479516143.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/i-got-free-tbc-on-roblox_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-earn-free-robux-without-human-verification_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/roblox-counter-blox-roblox-offensive-hack-2021_GM431946152.pdf
- https://bibliopolis.be/wp-content/uploads/fsqm-files/http-wwwrobux-hack_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005390.bin` `9cd9ef6825adb5eba82b0bcfb1696eb2300cd15ae858c69c1515e9e7b24bf7e3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5390	25012 bytes
`font_01_sfnt_off00008d81.bin` `0a326408698e42ccc10b21530c3b64adcb4691ae20bf9eae258dcc1a488a0a6e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D81	19044 bytes

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