Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ac2a6c3dc2a523…

MALICIOUS

PDF

37.0 KB Created: 2021-05-23 14:18:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 08a197e7dd4c4434739f1edf479cab5a SHA-1: 72de2bd89d6a4aaeb11e76cccb476694c30ced1f SHA-256: e4ac2a6c3dc2a523cc65caaaf9e0288029a52622a4f1b50d7d3144f7c194f1a2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that attempt to lure the user into clicking a URL disguised as a 'game hack' or 'free generator'. This URL, https://netcdn.xyz/app/431946152/how-to-earn-free-robux-game-hack, is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt designed to lead the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000029d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29D9 25696 bytes
SHA-256: 2e31a21b42cc6283d4236f1fbdd83348e2038286cd6f48a003349d135a38f2dc
font_01_sfnt_off00006520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00006f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 18404 bytes
SHA-256: 14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e

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