PDF malware analysis — malicious · 7b3a720a6583c82a

MALICIOUS

PDF

227.2 KB Created: 2021-07-04 22:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: ec378f1029209d7ce069fbc5b93e7d19 SHA-1: d98401958bec4ab2ce5312588fad823b876ae733 SHA-256: 7b3a720a6583c82ac7f8f94f7385d9b73e2862e60c21b9d2ce2afb86f2665a87

172 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious. It uses a fake browser/software-install lure and 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 clean score 0.0118

Heuristics 7

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
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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 http://netcdn.tw/app/1094591345/pokemon-go-free-100-iv-coordinates-game-hack PDF link annotation
- http://www.sovtigaz.ru/f/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/how-to-kick-any-one-from-roblox-server-hack-script_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/free-roblox-bugmenot_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/backpacking-hack-roblox-v3rmillion_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/me-hackearon-roblox_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/easy-free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/free-robux-generator-robuxian_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.sovtigaz.ru/f/files/roblox-mobile-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
`stream_023_off00031f6f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31F6F	25576 bytes
SHA-256: `fe8e6bedd71ef7fd2e5eda9101ba8c37affda72fefa72cf2ee3c43cb1c59d8e0`
`font_01_sfnt_off00035b78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35B78	19148 bytes
SHA-256: `ecefe5e4806552d9b11f1f8136ddd15b6502a196549b39a94a63e5d7ccde6de5`

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