Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37641bb44c29948…

MALICIOUS

PDF

36.2 KB Created: 2021-05-21 16:57:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ff4f58962ed44fa2e363191f721608f SHA-1: 48abc0ac0413e9f766ab3cecf67c32bc94101c24 SHA-256: d37641bb44c29948687b16d7f77d4b3b971ec35738cbb5eea91a008126dccaad
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL, 'https://netcdn.xyz/app/479516143/minecraft-java-edition-download-free-game-hack', is associated with a critical heuristic firing for malicious redirector infrastructure. The document body and embedded artifacts suggest an attempt to exploit user interest in free game-related content to drive traffic to these malicious sites, likely as part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/minecraft-java-edition-download-free-game-hack In PDF document text
    • http://londiniumcentre.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/moon-active_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-can-i-get-free-robux_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_off00003347.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3347 24880 bytes
SHA-256: 983c9fd601f2ad3dcd59fd48ac5630835d6d15039b137c2cd4aa1926e018cc76
font_01_sfnt_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 18572 bytes
SHA-256: b44bcce2d8515c0d099a66814c088ed689798a3dbc3c1364cf14b7c888151b67

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