Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d8d22c01f746cf…

MALICIOUS

PDF

30.3 KB Created: 2021-07-18 23:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28c181b0fd40423b3e5c854c7e73c830 SHA-1: 4637adf2904005e944e8b891ecaca678790602f4 SHA-256: f9d8d22c01f746cf1cde499c316f5565b1724994cde00bc68dc232e255e0f539
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a 'game hack' generator. The document body explicitly mentions 'Free Robux' and 'Robux Generator', reinforcing the lure. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0798

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/how-to-get-free-robux-game-hack In PDF document text
    • https://www.sauvonsleclimat.org/images/is-minecraft-dungeons-free_GM479516143.pdfIn 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_off000022cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22CF 22176 bytes
SHA-256: e3d942fbe72cb6117248b63230136fc86b4e7d606b960f44807574daa661c8bb
font_01_sfnt_off00005409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5409 18468 bytes
SHA-256: bfd0bb3e535f31ad3dec3a4faa455a2d823d510b4f27f0e8fabe0982a1b88800

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