Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc911c975d5e77c…

MALICIOUS

PDF

30.2 KB Created: 2021-07-29 14:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d82797ecdc8d8fe23b99bb098f8bad4e SHA-1: 2094c7f8b59abf38b7f4c7acb1ae640949b9a256 SHA-256: 6fc911c975d5e77cde8042b8185672264a1cb0f750ad00f372ef0c598a2543a8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body explicitly mentions 'Robux Free 2021' and includes a 'CLICK HERE TO ACCESS ROBUX GENERATOR' call to action, reinforcing the lure. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt leveraging a malicious redirector.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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.tw/app/431946152/robux-free-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2093 22824 bytes
SHA-256: 1f0cdd38d9c756b0a27b5c1cc1b04f42c0e1fbc53073ac37d08966c69629ae13
font_01_sfnt_off000053a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A0 18600 bytes
SHA-256: 707a6d454891e35f388a0d8205a2e46c0fc3a373aa9514799a3734f761808fc4

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