PDF malware analysis — malicious · 894af3594fc0c046

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 18:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: eab2587632b4dade2eaa11005d944e31 SHA-1: 2c75896e4fb168f0c12b671a64c294d1a899bbd1 SHA-256: 894af3594fc0c0467574a78012d8ca4bb6685815099aa9e064f94fbc270824e8

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by an ML classifier and exhibits characteristics of a fake CAPTCHA lure. It contains an external URI pointing to a suspicious URL, likely intended to trick the user into downloading a secondary payload. The document body, though heavily obfuscated, contains references to the malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/mathep-game-hack PDF link annotation
- https://www.wcauk.org/uploads/files/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-robux-100-legit_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/corn-master_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/tiktok-free-view-iphone-6s_GM835599320.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004f67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F67	28188 bytes
SHA-256: `6901801847fba16f616dd455347c24f5867bf623b6e1c7bbfda6c1b3d1fba8ab`
`font_01_sfnt_off00009029.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9029	18068 bytes
SHA-256: `2b3a9c081553d581a827df65dee23cc3b514f38b63125b20306762026e644864`

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