PDF malware analysis — malicious · 314289d7d6bf5a1e

MALICIOUS

PDF

51.2 KB Created: 2021-06-03 22:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 554200f333c3f46ab521af1e5ba2b54a SHA-1: b21ad1df62b1f50f6779f963751ae3964875627f SHA-256: 314289d7d6bf5a1eb7b5068f38712a3aac326981fd43c4ddb3d01b296b68ce7b

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9713

Heuristics 5

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/rbxoffers-com-free-robux-game-hack PDF link annotation
- https://www.bridalguide.com/sites/default/files/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/www-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-safe_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-real-working_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/no-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000051fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x51FC	25796 bytes
SHA-256: `ced9bbc3bcf2dcfa7275a74c75a7f84fe7531141d062de0be3cd471901386802`
`font_01_sfnt_off00008e48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E48	2880 bytes
SHA-256: `106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081`
`font_02_sfnt_off00009833.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9833	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000a545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA545	18276 bytes
SHA-256: `33587a0de9fe244dccc6feb4df3ae622cc669a227e305313b85abf77a5936fbf`

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