Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f021069e1a3cc9…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 08:08:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8343dfcee417a64cdc1150cc6f4bbef SHA-1: 08510e77e9445586a97cafb2881cf5341c3fb047 SHA-256: c1f021069e1a3cc958c83a9a5b9040549d8461a22dc39bd57c969f4499b62a12
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 0.9980

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 http://netcdn.co/app/431946152/roblox-freebies-hack-game-hack PDF link annotation
    • http://ff-klaffenbach.de/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/roblox-infinite-robux-cheat_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/check-it-free-roblox_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/ultimate-trolling-gui-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/hacks-for-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://ff-klaffenbach.de/images/how-to-get-free-robux-no-survey-no-download_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_off00003048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3048 22132 bytes
SHA-256: 8b31fdb1d9815fdb6eb350e5a8e51db4f2445d11767852ae95a7bc59f7a22ac5
font_01_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 18940 bytes
SHA-256: 04cfa04ae2c9ffc8b26157eaca4924edf727563806ec24d37342dec68d35efea

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