Malicious PDF — malware analysis report

Static analysis result for SHA-256 5944f7d63ba868cc…

MALICIOUS

PDF

37.4 KB Created: 2021-05-21 16:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c225b958801b0e0c537d1741b21a05aa SHA-1: d375a25a27cab7539db355270513a3242e1743d0 SHA-256: 5944f7d63ba868ccbf0aa21ad55e359f2d65213a73a24b98beca59ae497ca9e3
160 Risk Score

Malware Insights

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

The PDF contains multiple links and a call-to-action phrase designed to trick users into visiting a malicious URL, disguised as a "free Robux generator" or "game hack". The primary malicious URL, https://netcdn.xyz/app/431946152/get-free-robux-no-verification-game-hack, is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user interest in free in-game currency to deliver a payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/get-free-robux-no-verification-game-hack In PDF document text
    • https://www.najeebqasmi.com/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn 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_off000034d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D3 25624 bytes
SHA-256: 449b7cc1fed5f61a070330cfce2ac71e93a461ee015a8b8c3a86dd7f3eb838f8
font_01_sfnt_off0000701e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 18600 bytes
SHA-256: 9922d9be899d889309b30d551f0ca0ad5440aa2f545e895e218caf9f3be39a86

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