Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6aeca6c883ebf9…

MALICIOUS

PDF

40.5 KB Created: 2021-05-13 06:03:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f1935a0fc771d47fb3ab39fc2ff7a313 SHA-1: 85ceec7133028991cc5576befa3b110041ff868f SHA-256: fa6aeca6c883ebf94b6eac7a3aad8a5a604e49a2dc687b7ec5b1afa25dc627e8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The embedded URL 'https://netcdn.xyz/app/431946152/rbxfree-com-free-robux-game-hack' is identified as a known malicious redirector. The document body also contains text related to 'free Robux' and a call to action, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/rbxfree-com-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003491.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3491 27564 bytes
SHA-256: 8ee21a8997f7644530c69598d9b50fdbbb104753abfb7c076bf3cbd878dbbd51
font_01_sfnt_off00007314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7314 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00007ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCF 18276 bytes
SHA-256: 3458f47f0b0e4c5d178391a23bbf01d917f000ba7933fbc297d15d2e5240f022

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