Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e11d100c7ce7c89…

MALICIOUS

PDF

38.9 KB Created: 2021-05-22 09:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6c815d4620d2b519f0f51dc9b30978a5 SHA-1: 6fe98e08dd3445b91297f24474106b42fd747b17 SHA-256: 3e11d100c7ce7c89dfab7ece171080cb3d87b9a22759caabaceb5a4cd9ef96b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a website promising free game currency, a common lure for scams. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious infrastructure, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-get-free-robux-no-scam-game-hack In PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-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_off000035c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C2 27716 bytes
SHA-256: 5eaff3ed283cb90f6a9cf9b7addfe85f24021495f672c4ebfea5724f46fc2dad
font_01_sfnt_off0000756d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 18768 bytes
SHA-256: d1f42346170e568709c452458a32d8325f9466b63e26828f6615071549d089d8

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