Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f2533eaeb60359…

MALICIOUS

PDF

27.8 KB Created: 2021-06-29 17:57:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a3c603153d7c4c1c7ca19be853b71ea SHA-1: a073f4befac477d685e6324b34833c04d165bb8c SHA-256: c1f2533eaeb60359e832ec004012e8880b34afea44c5fe9367083dbd90123c28
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a lure for a 'free generator' or 'game hack', specifically mentioning Robux. It links to malicious redirector infrastructure, suggesting an attempt to lead the user to a site that may host further malicious content or phishing attempts. The document body contains text related to 'Robux Generator' and a call to action, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-fake-game-hack In 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_off00001775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1775 22128 bytes
SHA-256: 8dc73b55c2ef270741d759854dd580d24850f3bfa7f52d97113bff14ffb29e5e
font_01_sfnt_off00004897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4897 19152 bytes
SHA-256: 5bff4a78264baa04871d6c1840cc5d977c48acf296bc63c0b0fa99f59176636d

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