Malicious PDF — malware analysis report

Static analysis result for SHA-256 759395043d5fedfb…

MALICIOUS

PDF

36.8 KB Created: 2021-05-22 16:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 96bb19ddc6cb07d0ca35e3abae982e0a SHA-1: 5ef460edf5b92146a8dc5a09193082de7196e25a SHA-256: 759395043d5fedfb79247e74ded39f8752cbc417bbcfb3a060ae492ca73bf938
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators' for popular games like Minecraft. The document body includes a call-to-action phrase and a primary malicious URL. The heuristics indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-play-minecraft-for-free-on-pc-game-hack In PDF document text
    • http://calavera.be/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/how-to-download-minecraft-for-free-on-android_GM479516143.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_off0000370c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x370C 24652 bytes
SHA-256: 61af67185001649dc53053ae0170d0a2a92fa08414ddc94e43d3de510b6fd855
font_01_sfnt_off00006ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 18284 bytes
SHA-256: 805db6617afe2d237489c8bb7c2b5cc2832d34670fdae12a8b82fd0acde92e0c

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