PDF malware analysis — malicious · c6dc26875fdd20c5

MALICIOUS

PDF

46.4 KB Created: 2021-06-08 12:26:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 7fa3854dda3237c57302611f544fa240 SHA-1: 623889c92459055890aa969284153c4431febc11 SHA-256: c6dc26875fdd20c585a16e39995b00d922d342fe22debad0404017cc9b7377d2

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 malicious link, which is a common social engineering tactic. The embedded URL and numerous other URLs point towards the distribution of game cheats or hacks, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of a fake CAPTCHA and external links indicates an attempt to trick the user into downloading a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9682

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/hack-piano-roblox-game-hack
- https://bancroftandsons.com/images/coinmaster-free-cards_GM406889139.pdf
- https://bancroftandsons.com/images/roblox-script-executor-free-download_GM431946152.pdf
- https://bancroftandsons.com/images/avatar-de-roblox_GM431946152.pdf
- https://bancroftandsons.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdf
- https://bancroftandsons.com/images/roblox-got-talent-piano-hack_GM431946152.pdf
- https://bancroftandsons.com/images/minecraft-dungeons-free-download-pc_GM479516143.pdf
- https://bancroftandsons.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
- https://bancroftandsons.com/images/coin-master-hack-reddit_GM406889139.pdf
- https://bancroftandsons.com/images/adopt-me-roblox-hacks_GM431946152.pdf
- https://bancroftandsons.com/images/ways-to-get-free-robux-2021_GM431946152.pdf
- https://bancroftandsons.com/images/roblox-super-checkpoint-cheats_GM431946152.pdf
- https://bancroftandsons.com/images/roblox-sign-in-free_GM431946152.pdf
- https://bancroftandsons.com/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
- https://bancroftandsons.com/images/get-free-robux-com_GM431946152.pdf
- https://bancroftandsons.com/images/roblox-sharkbite-sharkteeth-hack_GM431946152.pdf
- https://bancroftandsons.com/images/free-hair-roblox_GM431946152.pdf
- https://bancroftandsons.com/images/free-spins-coin-master-hack-2021_GM406889139.pdf
- https://bancroftandsons.com/images/free-robux-mobile_GM431946152.pdf
- https://bancroftandsons.com/images/how-to-get-free-robux-without-email_GM431946152.pdf
- https://bancroftandsons.com/images/robux-live-stream-roblox-hack_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_off00004d82.bin` `2918547cddbdb2bc2886cda432ea74a6dbd83ca21b85dd31b3db24bf2b300676`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D82	24528 bytes
`font_01_sfnt_off0000855f.bin` `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x855F	3884 bytes
`font_02_sfnt_off00009207.bin` `30654e45af09f9afdbdf41c4e46b277b277c517d4b1e6a859ad61fd66454b477`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9207	18456 bytes

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