PDF malware analysis — malicious · 77d3dd54ea950f8c

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 20:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 408e01ecc253b0b8d8973a10cdb36e37 SHA-1: 8f57a352e7d85c911b5e6fb4d29871365a41dddc SHA-256: 77d3dd54ea950f8c5934f6e698838add0ef0f5bfc0b75d63708458ed2f0f355c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and embedded URLs, indicating an attempt to trick the user into visiting a malicious website. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a redirection to a potentially harmful resource. No scripts were extracted, but the overall structure points to a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/431946152/free-robux-on-ipad-game-hack PDF link annotation
- http://apteka-ot-sklada.com.ua/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/free-robux-just-click_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/free-robux-cards_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/roblox-e-free_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-hack-1021_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/what-is-robux_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-com_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
- http://apteka-ot-sklada.com.ua/images/free-robux-without-any-verification_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
`stream_003_off00004837.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4837	26048 bytes
SHA-256: `80484538d04f43be146b70ebf394381e0457c1a686773f2f9872577573053ca7`
`font_01_sfnt_off0000849c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x849C	18592 bytes
SHA-256: `4ae05b13a8d3623fc8be9d582b03374b6da1b7c2137e59ff761560f156580baa`

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