Malicious PDF — malware analysis report

Static analysis result for SHA-256 740b7bec80a934a0…

MALICIOUS

PDF

38.7 KB Created: 2021-05-21 01:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 26ca972e63abf35fb2819939d29688d8 SHA-1: 934314c4cd50102af8833a4f9e2203b41aa308ed SHA-256: 740b7bec80a934a067b34cbc5d8b3317f1b0e451486ea446cd694ac1cef9e48b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', directing users to external websites that are likely malicious. The document body and heuristics indicate a lure for game hacks, specifically 'Free Robux', which is a common social engineering tactic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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 https://netcdn.xyz/app/431946152/free-robux-games-on-roblox-game-hack PDF link annotation
    • https://cluster-consulting.com/images/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/spin-link_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-spins-and-coins-daily_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_off0000329b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329B 29560 bytes
SHA-256: ace825a8b9bcf654133f073712e2928c9c2c3d2055ba54db2e4a42537de108c1
font_01_sfnt_off00007558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 18576 bytes
SHA-256: 121d272924a8948b6bfdf19867642727f57edf659587de43eb46571e5003926c

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