Malicious PDF — malware analysis report

Static analysis result for SHA-256 336c11b722bc597d…

MALICIOUS

PDF

36.0 KB Created: 2021-05-16 04:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 250e3b8f02de200526036730f6cff4a4 SHA-1: ea8cf8a61345a1a89bafbab93507f0deb0df8d4a SHA-256: 336c11b722bc597da3ae04eb62b879d5dfd28a76b56d2b040f34fec8a1aa802b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded artifacts suggest a social engineering attempt to trick users into visiting a URL that promises free in-game currency. The embedded URL is the primary indicator of malicious intent, likely leading to further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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/actual-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_off00003229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3229 24784 bytes
SHA-256: 20e0123bdccaa30d29e8559eb6028f70ee9a8e32905ac9f9db2e383b59fe25f4
font_01_sfnt_off00006aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 18420 bytes
SHA-256: 37b67a04c59087902b42b65f26bec20808041b5185ddbc4d4c9e15973e68d0ef

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