Malicious PDF — malware analysis report

Static analysis result for SHA-256 5775bbe179c17315…

MALICIOUS

PDF

40.1 KB Created: 2021-06-03 06:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 90b388854034bdd6602b1d0e2bc1027f SHA-1: 6b45a1598854e48a431b7e9b06ee1809b0418537 SHA-256: 5775bbe179c17315612d68438f9d47939ea0cc27fdae6e0faf8386cb388cf19a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to obtaining free Robux, directing users to a URL associated with malicious redirector infrastructure. The embedded URL is designed to trick users into clicking through to potentially harmful content. No scripts were extracted from this sample, but the PDF structure itself facilitates the malicious redirection.

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.online/app/431946152/how-to-get-free-robux-on-phone-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

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
stream_003_off00003789.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3789 31056 bytes
SHA-256: 5e509720e3dc29eec7f88ab3061c3708d44a15b224ba18dd4680b669536841c7
font_01_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 18400 bytes
SHA-256: 84938888dbf1cb44994086072126f51acd5dd23be51e28e959f9d9272ac28f12

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