Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba17897ae5e48ed3…

MALICIOUS

PDF

34.4 KB Created: 2021-05-22 19:09:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66a78791ecd124cd6f06264f25e20df9 SHA-1: 0b05749dffec6513420b1f6d20d4fecbda960daa SHA-256: ba17897ae5e48ed3d8c0cbea011729a153018b730de571968d3159b49c62c6c8
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS ROBLOX GENERATOR', further reinforcing the lure. The primary malicious URL identified is https://netcdn.xyz/app/431946152/microsoft-free-robux-game-hack, which is associated with redirector activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/microsoft-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_002_off000026f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x26F2 27620 bytes
SHA-256: 69e7e8ecbc60af28f6447c0488b0b5a62e115582b81010809105002ff59e5faa
font_01_sfnt_off0000657a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 18160 bytes
SHA-256: 778beca7fcd68ead51a95cd8de6f0a781b0312d7258ab4f1468c94798783ce04