PDF malware analysis — malicious · 047c885d42621ad0

MALICIOUS

PDF

54.2 KB Created: 2021-06-08 21:43:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 0956be6d6df48b69d4bbc7a12c18c21c SHA-1: 0f7eeb28a93e9b1b0edfa29020ac39d80310ce5a SHA-256: 047c885d42621ad0081465c5692ee58f5158e19392e41b6ffdf0b4ef69a5ed2b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA to lure the user into clicking a link, which likely leads to the download of a malicious payload. The embedded URL and numerous other URLs found within the document point towards game hacking or exploit-related content, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of a fake CAPTCHA and external links strongly indicates a malicious intent to trick the user into downloading further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9636

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/hacking-pesonn-roblox-script-game-hack
- http://bufbd.org/images/javascript-free-robux_GM431946152.pdf
- http://bufbd.org/images/100-free-spins-coin-master_GM406889139.pdf
- http://bufbd.org/images/free-spins-for-coin-master_GM406889139.pdf
- http://bufbd.org/images/free-robux-scam_GM431946152.pdf
- http://bufbd.org/images/roblox-how-to-get-free-items-in-catalog_GM431946152.pdf
- http://bufbd.org/images/how-to-get-free-tiktok-followers-without-verification_GM835599320.pdf
- http://bufbd.org/images/how-to-get-free-robux-no-scam_GM431946152.pdf
- http://bufbd.org/images/roblox-executor-free_GM431946152.pdf
- http://bufbd.org/images/roblox-zone-free-robux_GM431946152.pdf
- http://bufbd.org/images/coin-master-jackpot-madness-hack_GM406889139.pdf
- http://bufbd.org/images/minecraft-hacked-client-112-2_GM479516143.pdf
- http://bufbd.org/images/infinite-robux_GM431946152.pdf
- http://bufbd.org/images/free-tiktok-followers-instantly_GM835599320.pdf
- http://bufbd.org/images/roblox-hack-download_GM431946152.pdf
- http://bufbd.org/images/rbx-free-robux_GM431946152.pdf
- http://bufbd.org/images/coin-master-daily-free-spins_GM406889139.pdf
- http://bufbd.org/images/coin-master-hack-app-2021-download_GM406889139.pdf
- http://bufbd.org/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdf
- http://bufbd.org/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdf
- http://bufbd.org/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000053ad.bin` `af5c89bc2e4f7dfcf941bc4cb9edbb176c60182b90144bee9c4e9874755794e8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x53AD	36432 bytes
`font_01_sfnt_off0000a4c2.bin` `471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4C2	3112 bytes
`font_02_sfnt_off0000af7c.bin` `6a47c7a207be9f8ccf6c48432d7a73e6f0c196d3eb73138d94aeb4e8adcd5d9c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF7C	19024 bytes

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