PDF malware analysis — malicious · 2b3c8f02d26f49c9

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 13:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3a7acf487ab82298812421ec52f4cd9a SHA-1: a570f38cc32c561c298298e6902e53ba3ecb09ad SHA-256: 2b3c8f02d26f49c9e8469e4e332c7f653a18e71d064d87f9e72e526e3e84a46d

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains invisible links that redirect to CAPTCHA-themed websites, a common lure for users seeking free items or game cheats. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a download or further compromise attempt. No scripts were extracted, but the overall pattern points to a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 4

Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE

PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
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/free-roblox-rum-game-hack
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-robux-giveaway-every-hour_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/get-free-robux_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/minecraft-multiplayer-free_GM479516143.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/how-to-hack-breaking-point-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/how-to-get-the-rarest-item-on-roblox-for-free_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/cheats-robux-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/roblox-hacker-egg_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-supreme-shirts-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-ranked-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-robux-generator-no-survey-or-captcha_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/omg-this-worked-how-to-get-1-million-free-robux_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/how-do-you-hack-players-on-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/how-to-hack-somebodys-account-in-roblox-2021-jan-2_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/roblox-free-robux-hack_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-bucks-roblox_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/can-someone-hack-roblox-and-steal-robux_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/how-to-give-urself-items-in-roblox-with-cheat-engine_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/cheat-engine-roblox-edit-values_GM431946152.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
- https://www.awwda.go.ke/wp-content/uploads/fsqm-files/free-roblox-accounts-with-builders-club-2021_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_off000051c4.bin` `f8a3309bffa78eb50b03d4a839086be47a4d39b29cb96b3a364307a653c81010`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51C4	26568 bytes
`font_01_sfnt_off00008f73.bin` `b62b065b3ffebc886560d61978a6a808d4549abda2de7fe77a05d96ffec6a609`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F73	18348 bytes

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