Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b2f19a7db47c37…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 01:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d2e7ab4ddad66249b3bedf2bc44f4b2f SHA-1: 84ce101b0fcc06f07940898c59bbfdd0ac94c1ab SHA-256: c7b2f19a7db47c37f4800d8cd70120f119fc773ed40141663a8f3a266da6d734
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking a link. The primary link points to a site offering 'games that give free robux', which is a common lure for scams or malware downloads. Numerous other PDF documents hosted on similar domains are also referenced, suggesting a campaign distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/games-that-give-free-robux-game-hack PDF link annotation
    • http://apx-centre.ru/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-app_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_off00004997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4997 27244 bytes
SHA-256: c1913807286e32bace9477f52c90295822c9f3206157f029ec121697719cf319
font_01_sfnt_off00008732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 20052 bytes
SHA-256: 7a94a12980be607dd64cb4341679f7e9710563e73fa3305f9170327ee22ce8c4

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