PDF malware analysis — malicious · f1ea8ea2c20c3544

MALICIOUS

PDF

46.4 KB Created: 2021-06-02 21:41:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: f483fe3049f8bbdb88debfa3688c9279 SHA-1: 648343a647b2e1a4646562b9558439dc06490771 SHA-256: f1ea8ea2c20c3544e8817985b1ac473827bb421337a2a5dbdb12346ca9383c6b

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to domains associated with SEO link farms. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic suggests a lure to click these links, which likely lead to malicious content or further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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.xyz/app/431946152/como-ser-invisible-en-roblox-hack-game-hack
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/roblox-pink-free-robux_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/can-you-really-get-free-robux_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/how-to-hack-tycoon-on-roblox_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/minecraft-free-play-no-download_GM479516143.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/free-tiktok-followers-and-likes_GM835599320.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/gaming-app-cheats-com-roblox_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-account-on-chromebook_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/minecraft-marketplace-free_GM479516143.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/cbro-roblox-funds-hacks_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/synapse-roblox-hack-download_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/free-robux-websites-2021_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/cheat-engine-roblox-cheat-table_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/minecraft-pe-free-apk_GM479516143.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/roblox-html-hack_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/roblox-free-premium-method-v3rm_GM431946152.pdf
- https://www.discoveryhousemontessori.com/wp-content/uploads/fsqm-files/roblox-pinewood-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
`font_00_sfnt_off0000563d.bin` `d2c71f7b81d3cbaa8199888f9f0c35b5f52836a824c536661f1842aafc5f16ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x563D	25652 bytes
`font_01_sfnt_off000091ba.bin` `59c5052c9fdec2894e9e8c010f4909f5637b0c35ad816cfbf7aceafdabf22cd2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91BA	18676 bytes

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