Malicious PDF — malware analysis report

Static analysis result for SHA-256 684d1b4d1a84ed49…

MALICIOUS

PDF

28.7 KB Created: 2021-07-20 04:13:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9412928edd1dc67a0e48f18dd94d843a SHA-1: 04c4648a7504038479673d1c91843c394727aad2 SHA-256: 684d1b4d1a84ed49bd7060d0994c4f2517ecfd445a1b9f1fd36f241c30e3db6f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body also contains text related to 'Minecraft Apk Free Download' and a 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' call to action, reinforcing the lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

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 http://netcdn.tw/app/479516143/minecraft-apk-free-download-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_off00001f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6F 21148 bytes
SHA-256: e9aaf8518a66d8a60d183a3d45b6f91491c5343f928ac4ceefdc5f2355e9c000
font_01_sfnt_off00004d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6B 18636 bytes
SHA-256: 460052af6c2621f53863fdd0e184641c8149664fef9b3bc68df6f3fcb4cff320

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