Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc076d852916d0a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-07 08:23:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2a20e0974527743846ae6ec2f03f955e SHA-1: 64d76056704a20d04ee7a3ee7aafb98466bf35b6 SHA-256: ccc076d852916d0a1d7aed71ffaac8f8cf37c0bfd47ffa30abd01494bc52d3a2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Free Copy Escape Obby For Roblox Game' and includes the malicious URL. This suggests the document is designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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.tw/app/431946152/free-copy-escape-obby-for-roblox-game-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_off00002b65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B65 26852 bytes
SHA-256: d0ab2eaf5834935750f6820064f5bbeb9a453e1c5bea87a34eaf3df82ecdd7a5
font_01_sfnt_off00006778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 18356 bytes
SHA-256: efa73f8997b7a9ff03091cf64db128a0ddce14a1e339a5d3d15d0b892a8b799b

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