Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d754e137aec673…

MALICIOUS

PDF

26.2 KB Created: 2021-06-18 13:43:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c34264db0a0cae5b613a845f4c0e7c22 SHA-1: 4905d67fdc6474d9ef52ea9fac32b4d2e39b0b27 SHA-256: b0d754e137aec67374e301945accdd1a509a422813b83948b4ae653b48947405
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a suspicious URL. The document body also contains the same URL and a call to action. This indicates a phishing attempt to trick users into visiting a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0372

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/rbx-center-free-robux-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_off0000148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F 21288 bytes
SHA-256: dfa12c48cd279b5deb6f463ee8e119a1749215c621888e11f81685e160226bd1
font_01_sfnt_off00004350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4350 18820 bytes
SHA-256: 5aa00de4e1ddf310143140f6d298e0e40188410dcb25e63c927598621da0c1f4

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