Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdaca1afe7a706e…

MALICIOUS

PDF

31.4 KB Created: 2021-07-04 06:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: df687bcbe1061abb66c2a72768c0d33f SHA-1: 31b6f4e4f52b1cc9dd8f183b561ab9bfee10182b SHA-256: 2cdaca1afe7a706e2b96e0a8c43b7df4414ad98121df59a866a29e477a9d81ff
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'game hack' or 'generator'. The document body text reinforces this lure with phrases like 'How To Cheat In Roblox' and 'CLICK HERE TO ACCESS ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0580

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/431946152/how-to-cheat-in-roblox-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_off00002664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2664 22032 bytes
SHA-256: 9d412689477a5cb603a97dc5b71656ed7c4bfc79b972c0a5e0908b56bbb0d4ab
font_01_sfnt_off00005711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5711 18920 bytes
SHA-256: 468b755c891fb15eb82dc2034f3653d5d3fa2a4e0ae63dff6dd7d55aaab30fa7

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