Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb6ced383fecdda…

MALICIOUS

PDF

29.4 KB Created: 2021-07-18 22:31:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 929711953b198a3f0a23af563bc3dbe2 SHA-1: 208a618ecdc08c035d15f5b4796466de36fb552b SHA-256: 7cb6ced383fecddabd1ae2586a0118ad071761f83e0d7b65107e02724efd0715
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "free Robux generator" hack. The document body also contains similar lures and a call-to-action phrase. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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/apps-to-get-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
font_00_sfnt_off00001e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E85 22576 bytes
SHA-256: 73248918fac9387e89d399f7ca33819fa8c5200ae6589b44ceeaece069a3dce9
font_01_sfnt_off000050cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50CB 18480 bytes
SHA-256: 5adc42e6ee0c4a9aa68860894580334acf05e1ff62bdf9cc2e4be84be310e939