Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a0954bf715c0e4…

MALICIOUS

PDF

30.4 KB Created: 2021-07-26 07:50:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cf279b0d7d1d015094ce4402d30bb512 SHA-1: aea27b47fbd8e37a0caef7ae7b0b2bc08af26a60 SHA-256: 59a0954bf715c0e4823b68e26106bee991490295f92011d77372b47f03f3dbbf
130 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a redirector link, specifically advertising a 'free generator / game hack'. This link, http://netcdn.tw/app/431946152/free-robux-discord-game-hack, leads to known malicious infrastructure. The document body also contains references to 'Free Robux Discord' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. While no scripts were explicitly extracted, the nature of the PDF and the redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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/free-robux-discord-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_off00002254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2254 22424 bytes
SHA-256: 92001f0f68f40e4b15e3e1c6d2823800d04978afd3b08c42c64874a8eb2def1e
font_01_sfnt_off00005430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5430 18660 bytes
SHA-256: d34f3ea799e9fe8770c2c4ca346860624244dc7d3ab504a825f1e5fbc601b08e

Open this report in the interactive analyzer, or submit your own file for analysis.