Malicious PDF — malware analysis report

Static analysis result for SHA-256 410cbcf668229844…

MALICIOUS

PDF

44.6 KB Created: 2021-05-20 00:08:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 033ba3f57ea7e50f1464d3d01debd053 SHA-1: 6f34cd11deec7a7c34c02a6cc4828d24e29ae52a SHA-256: 410cbcf6682298447b53acf6e792e324d14ee5bdef699b006818411d3611d4ea
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 0.9980

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/apps-to-get-free-robux-game-hack PDF link annotation
    • http://pia2000.net/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/robux-no-human-verification-2021_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_off000045ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45CA 32520 bytes
SHA-256: ce6936f42605402857768dfe67352ec021cce7a774525268921a724daa225ded
font_01_sfnt_off00008c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0D 18292 bytes
SHA-256: b4e5860ebf2343f9b18b94d86a305cbc7e8ebd2f2a6bfe7ceeed88b67548d8bf

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