Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a7a2e23964a9ec…

MALICIOUS

PDF

35.6 KB Created: 2021-05-16 03:01:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 020cefec5f40ef92c06fea40fcfa3db7 SHA-1: 793d2b3e0a7f1b41885b81fbc158253103bb7d6c SHA-256: 20a7a2e23964a9ecae8a49cafe9ef939264d6b48d4636afc9ef74883d2e43ea5
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristic firings indicating it is a malicious redirector lure, specifically promoting a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/431946152/how-to-earn-free-robux-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/how-to-earn-free-robux-game-hack In 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_off0000326c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326C 24192 bytes
SHA-256: ffbf03843241d20e2d37fbea5fe74429ffdaa7d6042119f08701c4c31bcf4c5b
font_01_sfnt_off00006937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 18404 bytes
SHA-256: 14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e

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