Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33d951e7a87d5a9…

MALICIOUS

PDF

32.1 KB Created: 2021-07-20 15:54:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 10bc6e39e54dbf5188b590ee43430697 SHA-1: e70cd56767843bdc0d353e18fcd567a4243622ef SHA-256: b33d951e7a87d5a925ed8b4a351f0f8f959ea0240f267fb73690e8cc02966993
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded links suggest an attempt to trick users into visiting these sites, likely for further exploitation or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-links-game-hack In PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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
font_00_sfnt_off00002a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A55 22164 bytes
SHA-256: b7fa6629225c92ed853edbcd8bc517393d113bf900f2ed4c6444dd76b091d791
font_01_sfnt_off00005b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B73 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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