Malicious PDF — malware analysis report

Static analysis result for SHA-256 63212e5ea51b28fe…

MALICIOUS

PDF

36.5 KB Created: 2021-05-17 17:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 49240bf14fa70741041cf990077324cb SHA-1: 65b956cd78d94aa8811aebc3064335ffa044955a SHA-256: 63212e5ea51b28fedda3d981aadb417d3385d059c9788639ed0543bfaa28ab8a
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a 'free generator / game hack' lure for Roblox. The embedded URL, https://netcdn.xyz/app/431946152/roblox-verification-game-hack, is associated with malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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/roblox-verification-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_003_off00003098.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3098 26028 bytes
SHA-256: 2113e3627d30d16ae2d23d2e74fe72b5ec28565625509c962ce7ce91826ebaec
font_01_sfnt_off00006cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD3 18372 bytes
SHA-256: 8e16c624761c7815a00ee9013e3827e71f8aa93179f7b81ef6a1eeeaa97f0eaa

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