Malicious PDF — malware analysis report

Static analysis result for SHA-256 a450ae52a9593e47…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 06:06:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a64b6da5168d76dedd757db40869b1e6 SHA-1: b09353b7b01548786ea2bec04645574fee795a85 SHA-256: a450ae52a9593e47efc5b42cb635a9b8f3d13439c49693b0fd670477130db78f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9832

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/free-robux-com-real-game-hack PDF link annotation
    • https://www.woundcare-today.com/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.woundcare-today.com/uploads/files/files/free-roebucks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CF 27708 bytes
SHA-256: 93c95ee26c1cfa506ca424df62564c6d6633592795ca2de45a957f8b4b00e30d
font_01_sfnt_off000091de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DE 18576 bytes
SHA-256: a83edd52c2be056a67ce389c2e3103e44ea5f6bc4cdf4c28a35d8553f09f80ba

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