Malicious PDF — malware analysis report

Static analysis result for SHA-256 4826bbab45825b5f…

MALICIOUS

PDF

2.5 KB Created: 2021-07-06 06:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 12aa87ae61aaac43a2651b541f4e0ee8 SHA-1: 42183215847d946fdd5ddc5e33c5ec2c554b3f6e SHA-256: 4826bbab45825b5f79a9fd85a71ba5de61c0734e450e1c2cd7dbcdc694743d24
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. This tactic is commonly used to lure victims into downloading further malware or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 3

  • 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.
  • 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-hack-spin-generator-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-app-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/redline-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text

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