Malicious PDF — malware analysis report

Static analysis result for SHA-256 687578ba9c8a6225…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 08:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b86a11a018f5205c02783838e11a51da SHA-1: aaf31f15a06e8008219ae2b1751ac13870e3f80a SHA-256: 687578ba9c8a6225dd3d75524b9846b67cbf18de9ca30a90a4e6cda23329ebd5
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 0.9942

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-java-edition-free-game-hack PDF link annotation
    • https://hassel-event.de/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-site_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://hassel-event.de/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/roblox-mobile-hack_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_off00002e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E86 22656 bytes
SHA-256: ad33f2d8b5c4e71c55c2696949f340d5fbd8cff02e952ee9c52bca566b1bd88f
font_01_sfnt_off000060f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 18164 bytes
SHA-256: e28d0ded599416f75746d42b4ddd49ac4ed584cd54835945167b34c6d366202b

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