Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69e6c82c6ac1855…

MALICIOUS

PDF

32.6 KB Created: 2021-07-19 16:18:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e715a3f333171b1950c8798333125058 SHA-1: bb6187e7697fa7c72ce628c900db83c59fd13b09 SHA-256: b69e6c82c6ac1855999f4e7ea71cfca40f4cbc6dc951a9ca4dd38b0ab2f1d11d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free coins/spins'. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-coins-and-spins-game-hack, which is designed to trick users into clicking through to potentially malicious content. The document body and heuristics strongly indicate a social engineering tactic to drive traffic to these redirectors, likely as part of a phishing or scam campaign.

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-coins-and-spins-game-hack In PDF document text
    • https://kontaktadig.se/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://kontaktadig.se/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://kontaktadig.se/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kontaktadig.se/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kontaktadig.se/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://kontaktadig.se/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://kontaktadig.se/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://kontaktadig.se/images/robux-hack_GM431946152.pdfIn PDF document text
    • https://kontaktadig.se/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://kontaktadig.se/images/minecraft-windows-10-free-code_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
stream_002_off0000282a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x282A 23756 bytes
SHA-256: 64777018133c4b5cfde05e31729cb8dc04d314e32b2884dd55ffa5942547c071
font_01_sfnt_off00005ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

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