Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0511c4a094582d4…

MALICIOUS

PDF

35.9 KB Created: 2021-05-10 11:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 79bc02aac6de9737f57ea857547d9ef6 SHA-1: 7cfd72be7e8700d413ab2c05ebbede07c8bf4ba1 SHA-256: f0511c4a094582d4ef14b0e357f880128617cda4fc90d6facbf00d9e3d97c988
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "Robux Without Verification" generator. The document body also contains similar lures and a call-to-action phrase. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/431946152/robux-without-verification-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_off0000332a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332A 23812 bytes
SHA-256: 420f9fe0838bada72b39ff690c68872508b5d8156fff31b008fec4a66d8c73e0
font_01_sfnt_off00006947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 18800 bytes
SHA-256: 8dd03be5ed9b12d1c3526750c50f565b8632fbaca0af0073180c26b06898ff47