Malicious PDF — malware analysis report

Static analysis result for SHA-256 703e4d6d5691edda…

MALICIOUS

PDF

36.0 KB Created: 2021-05-11 08:06:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 21c88f957aeca57e67bcb546b8587e53 SHA-1: 304b71e8b23a03af3bceadc2c4291c24af2d5d2e SHA-256: 703e4d6d5691edda4ca1f2845b223064f553a9e64e6bd42c1827d69e406d6dd2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a lure related to game hacks and malicious redirectors, pointing to the URL https://netcdn.xyz/app/431946152/rbl-gg-free-robux-game-hack. The document body also contains this URL and a call-to-action phrase, suggesting the user is intended to click the link to download something. No scripts were extracted, but the overall pattern indicates a phishing attempt to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0228

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/rbl-gg-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
stream_003_off000032ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32FF 24464 bytes
SHA-256: 58807b183b46cee78fcc0b6df6fc3e51f962aefa7d25b7954cf9d3d841f39133
font_01_sfnt_off00006b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 18376 bytes
SHA-256: 36d8e5c8df31ce5774558eb4dff236d908794f1052653b7bf9d7a2310610d2b4

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