Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc2fb80464d13a7…

MALICIOUS

PDF

36.7 KB Created: 2021-05-10 12:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 598d5feba344536c24a2b806f81253b4 SHA-1: 656fd457352bc92895d21ee2c32e7dfc5ed25d0a SHA-256: 7bc2fb80464d13a7ff7724bd26bd42009304de97c965fa283f2ce3dcd7800ce1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically referencing 'free Robux' and 'game hacks'. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-game-hack, is identified as a known malicious redirector. The document body also contains this URL and a call to action, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/free-robux-no-verification-2021-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_off000033c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C2 25072 bytes
SHA-256: 4bb9d62b8e8ae774f27f731998730aa016db72b0ec9c3915d54bc72823398b2d
font_01_sfnt_off00006bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2