Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e3cd05d07d2adc…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 06:30:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88d54083e00e15fbf95f729642ddae91 SHA-1: 809c490d86d66e24b594530cec377722dbeece1a SHA-256: 73e3cd05d07d2adc8562962fe09d93cf8040e7a0c5e89313691e401ddfdba159
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9969

Heuristics 4

  • 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.
  • 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/479516143/mcpe-free-download-game-hack PDF link annotation
    • http://optom.co.nz/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://optom.co.nz/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://optom.co.nz/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://optom.co.nz/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://optom.co.nz/images/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://optom.co.nz/images/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://optom.co.nz/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://optom.co.nz/images/how-to-get-free-robux-by-playing-games_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_off00004a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A09 31188 bytes
SHA-256: 0c92e52f88574dc9ddf039fc14dd57fcea8af69f9def5ec48589906abd862fdc
font_01_sfnt_off000089e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 18240 bytes
SHA-256: 9a1f81bbc101413fe43a9b313857328452ece1c5d1a1f8b03e9ae928595b3df1

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