Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24eb7afa0681a57…

MALICIOUS

PDF

37.1 KB Created: 2021-05-14 21:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: adaacca99008343a7ac79c76fa8d52d2 SHA-1: 921cf29a327cde8482162b79dd8dc63ff11b4e44 SHA-256: c24eb7afa0681a5718037b22e3f6637041538dcd1776a611be24251bffc11b18
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent call-to-action and a link to a known malicious redirector, disguised as a "free generator / game hack". The embedded URL is designed to lead users to potentially harmful content. While no scripts were extracted, the document structure and heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/code-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_off000034a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A6 25740 bytes
SHA-256: 7a20362a1d9d520a9f609e064b17b01d4e5c1d5844a9768c73ce798cf5da4525
font_01_sfnt_off00006fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 18188 bytes
SHA-256: 00280273b0975bee0187bf1a1cc0e29ac13cf800f2976c84d5f4ba53341fee41

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