Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa877fc91c92fa22…

MALICIOUS

PDF

36.3 KB Created: 2021-05-12 22:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b64cab2fdb49da09c494c06e8004433 SHA-1: 541fa1f141b65e858e26beda7c55b05e61116efe SHA-256: fa877fc91c92fa226d3914c12166f47cc700890298c6ef10b310386677975483
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link that redirects to malicious infrastructure, masquerading as a 'Roblox Free Login' generator. This lure is designed to trick users into visiting a site that likely hosts further malicious content or exploits. The presence of multiple heuristic firings related to malicious redirectors and lures strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0284

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/roblox-free-login-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_off00003344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3344 24776 bytes
SHA-256: 08374811fb00ff0f8c9fd5186ca0d62a919f4746f91e2e054f56bea7c359b57b
font_01_sfnt_off00006c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 18356 bytes
SHA-256: a8d26950e0e2eef33b27b6c10906646661cb910c2bf8a097fd7ed42515788ae2

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