Malicious PDF — malware analysis report

Static analysis result for SHA-256 c384b9e2ab41ff9b…

MALICIOUS

PDF

37.9 KB Created: 2021-05-20 22:49:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1914c1594ed58a78e981f651ef9be64 SHA-1: 7189eee18c5ca795ae727e53c9fd6c379d1f738f SHA-256: c384b9e2ab41ff9b819ac5e1e12f10ed385e289ec9d310c975c9856650207e24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'free generator' or 'game hack' themes, indicating a phishing or malware distribution attempt. The document body explicitly contains the URL 'https://netcdn.xyz/app/431946152/robux-free-2021-game-hack' and other suspicious links, suggesting the primary goal is to redirect users to malicious sites for further exploitation or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/robux-free-2021-game-hack In PDF document text
    • http://uristdona.ru/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-get-free-robux-com_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_off00003261.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3261 27672 bytes
SHA-256: 39ec950029557e029ec4b94e95530f4ad1dbf7fb04f48a8441dbd324e0d558b9
font_01_sfnt_off0000729a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729A 18416 bytes
SHA-256: 1a644f5289783458eb76ac5741ebd0afe9ba6d8f40911ca8ddb4573f3c6c1b2f

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