Malicious PDF — malware analysis report

Static analysis result for SHA-256 c028ee301e927b2c…

MALICIOUS

PDF

40.6 KB Created: 2021-05-10 16:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d33efbcd6df2ff6c17735ce525abd187 SHA-1: d430e2302816b89db6c854eeaacb00211eefb528 SHA-256: c028ee301e927b2c3937221ad723a416a269b5944abf5aca3c35b447e19de3fb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The embedded URL 'https://netcdn.xyz/app/431946152/free-robux-sites-that-work-game-hack' is identified as a lure for malicious activity. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a social engineering attempt to trick users into visiting a malicious site, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-sites-that-work-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_off000031d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D2 31928 bytes
SHA-256: 9e3c89948aafddef7dae3446692fe6c877e887498b4057ebc8a2d1f424613b70
font_01_sfnt_off00007b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 19000 bytes
SHA-256: c0bc6bb0706fab35ff455fc4816471a1ab7f6ae4486f691ef98043b3efa3f18d

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