Malicious PDF — malware analysis report

Static analysis result for SHA-256 2399fc0faa21efb4…

MALICIOUS

PDF

39.1 KB Created: 2021-05-14 04:11:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b54602f6d8639c30cd6594665c10ed87 SHA-1: bca0da75ccef2c08bce92b0214c6714ee5b64b91 SHA-256: 2399fc0faa21efb4df98659a951db57f8b928d4613fa28bbed6939c9134b4d70
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating a lure for game hacks, specifically Roblox, and links to known malicious redirector infrastructure. The document body explicitly mentions 'Roblox Hack' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect. The embedded URL leads to a redirector, likely serving as a downloader or further phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0134

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/roblox-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF4 25696 bytes
SHA-256: 17f34cdc2bc7defd1e61006a3a71b9a2ebbd0d956be177dff0c1ecc2b2f92017
font_01_sfnt_off00006b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 18184 bytes
SHA-256: 1e306c7abfe58da704748ef58ff750010dbbd803bf497203b0bed85dd8d0d5c5

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