PDF malware analysis — malicious · 8739b7e875f44a2c

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 14:33:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 40cc0f72ac545b03d770541704770ab0 SHA-1: d4f80d96af6291382b494c1ecdd7b25f0178b8f2 SHA-256: 8739b7e875f44a2c261dce53d2c9b29cf1201e8db8192046eb63f30155cb9e88

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or verification prompt to trick the user into interacting with it, which is a common social engineering tactic. It contains an external URI pointing to a suspicious URL, likely intended to host a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/free-coin-master-cards-game-hack PDF link annotation
- https://www.ausecus.com/images/roblox-robux_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/free-roblox-app_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/roblox-money-hack_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
- https://www.ausecus.com/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.ausecus.com/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/earn-robux-websites_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/mathep_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- https://www.ausecus.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://www.ausecus.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
- https://www.ausecus.com/images/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/free-executor-roblox_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
- https://www.ausecus.com/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000493e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x493E	25680 bytes
SHA-256: `3f9845957b5b170e43bac66c37b226e0afc374c2917ac8ff779951e73b98ad74`
`font_01_sfnt_off0000828a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x828A	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008c74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C74	17884 bytes
SHA-256: `34dd8c80f69d0f68a5b5993274c8f1bdeef3254478921523cc39dd8566b84a5f`

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