Malicious PDF — malware analysis report

Static analysis result for SHA-256 4966716ffb7a4fff…

MALICIOUS

PDF

37.7 KB Created: 2021-05-11 18:48:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 884e5349715872c0d61e57b77af08eeb SHA-1: 4d0b0908451da2896bd2a2d2d026023bde207384 SHA-256: 4966716ffb7a4fff2c2b78e09ab0aef396bba92134b1abaeafad58e81421b083
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded links reinforce this by advertising a 'free generator / game hack' for Roblox. While no scripts were extracted, the PDF structure itself facilitates the redirection, indicating an attempt to lead users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-change-your-name-on-roblox-for-free-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
stream_003_off00003270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3270 25932 bytes
SHA-256: 8fbc3710b8da0af35bb173c6860aba662cbeccecd19f67e1311debc074b4485c
font_01_sfnt_off00006f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 19356 bytes
SHA-256: 46dbaf38c2934d32573e6b2165b3ea5430dcd60e12112d7b0d2bfe059cc09281

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