Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cfe4ef410341c3…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 07:43:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa22202a124975c8695d3ea5a0c66033 SHA-1: aa6455293f395cbfdbda0f980d36d1a8ebc3e3c1 SHA-256: 97cfe4ef410341c3b986d7af617b2bae9cf55f430fdd91a8e771616c084399ca
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The embedded URL, 'https://netcdn.xyz/app/431946152/free-robux-websites-that-actually-work-2021-game-hack', is associated with malicious redirector infrastructure. The document body, though partially garbled, also contains references to 'Free Robux' and 'game hack', reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0739

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/free-robux-websites-that-actually-work-2021-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_002_off00002e45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E45 26700 bytes
SHA-256: 3fcf4d07bef0d3efcaa26c7c7191cedb6e51c61a136c8c5dd6de6ac819225749
font_01_sfnt_off00006aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 19656 bytes
SHA-256: 7b3ca8e33f6ab65cae0b12a773bae5d0e0377a7b1030ef9ec14be3c3cdd71d54

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