Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41bce32f8aef5f4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-19 23:42:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c0758878637ee8d20b81dcf26d5d2e07 SHA-1: d933aaa954beaa3985a080de015cb6b36b1c3fc7 SHA-256: b41bce32f8aef5f432220c4d0b033232d27ff472f3d2863760bebd03282fb9f7
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 0.9962

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.tw/app/479516143/minecraft-hack-download-game-hack PDF link annotation
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-come_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_off00003184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3184 23116 bytes
SHA-256: f16545eb6ced39c7063c0bcd1d3dfb038f2ebd4503ad4a8f02c4d9a65dea5d00
font_01_sfnt_off000065bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BB 18460 bytes
SHA-256: 1986b917a50867421859734d90e96ce19f33df6ec3e97c13366e475f22860bb7

Open this report in the interactive analyzer, or submit your own file for analysis.