Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b4edea8f5ae416…

MALICIOUS

PDF

37.6 KB Created: 2021-05-21 03:06:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60adaa43025b4525f99efa752be432b5 SHA-1: 513b998b96480b6502c95aa0b62b546581be6b83 SHA-256: c5b4edea8f5ae4160f7efcef4a1344f45df9a41844312003abef2dcdbf340c0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase ('CLICK HERE TO ACCESS ROBLOX GENERATOR') designed to trick users into visiting malicious websites. The primary lure is related to 'free Robux' or 'game hacks', a common social engineering tactic. The document redirects to infrastructure known for malicious activity, indicating a phishing or scam attempt.

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/how-to-earn-free-robux-game-hack In PDF document text
    • https://www.jcn-revalidation.co.uk/uploads/files/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.jcn-revalidation.co.uk/uploads/files/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.jcn-revalidation.co.uk/uploads/files/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn-revalidation.co.uk/uploads/files/files/how-to-get-robux-for-free-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_off00003541.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3541 25780 bytes
SHA-256: 40186cb717c8e4e126eb6b78697bba8c8bb1fbce21dc7ba913cc4d2d1e1f2295
font_01_sfnt_off00007184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 18404 bytes
SHA-256: 14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e

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