Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2a9f89d70b6cf4…

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 19:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: feaf7e03afe42a8ee2d4ae7404e97701 SHA-1: 41651cc8786621a40d874556a15836df588b5c74 SHA-256: af2a9f89d70b6cf4ff1890d3e696f1f51c78bf93f69784cfd5839d9e7f800562
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for linking to a 'free generator / game hack' lure. The document body and embedded links point to URLs that are likely part of a phishing or scam campaign, aiming to trick users into visiting malicious sites. While no scripts were explicitly extracted, the nature of the lure suggests potential for further malicious activity upon clicking the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/431946152/how-to-get-free-robux-easy-no-download-game-hack PDF link annotation
    • http://sv-nahetal.de/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://sv-nahetal.de/images/daily-free-spins-for-coin-master_GM406889139.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_off00002a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A27 23440 bytes
SHA-256: fff4d1f954d32541063ca4a3596351274a1902339389da7aedab723bc70f4a2b
font_01_sfnt_off00005f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 19292 bytes
SHA-256: 54df6ab7cbd8da040d3fc0d471fd38ed670923c029d75c86ffa3c2631ce9a33c

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