Malicious PDF — malware analysis report

Static analysis result for SHA-256 8342bcdc21b19048…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 01:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 152d1c22a8c5d410eeb300004c92d9f4 SHA-1: 01bf854448948ffeb7b09b5c26bbc7222d49a7b1 SHA-256: 8342bcdc21b190488e479ad4dc4aafe2713caeada8973d7ea4c711ebde8a96a3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links, including one to 'free-robux-generator-without-verification-game-hack', and heuristics indicate a fake CAPTCHA or human verification prompt is used to trick users. This suggests a lure-based attack pattern aimed at redirecting users to malicious sites or tricking them into executing further malicious content. No scripts were extracted, but the presence of multiple embedded URLs and the fake CAPTCHA lure strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-generator-without-verification-game-hack PDF link annotation
    • http://mou16-murmansk.ru/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/more-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/get-free-roblox_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.

FilenameKindSourceSize
font_00_sfnt_off00004921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4921 24456 bytes
SHA-256: 583c0bb4c555639b0cb35ca1666fff4738cfb56b290cf443a0186b2f33d2725a
font_01_sfnt_off00008134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 18964 bytes
SHA-256: 28b129fa50d9ed943d388e6dee4b9579dbddb2c3d46c54f90e146500d20faa97

Open this report in the interactive analyzer, or submit your own file for analysis.