Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dfee63280efa0d…

MALICIOUS

PDF

36.9 KB Created: 2021-05-15 15:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 18406a7ea7f95e37df9f549b24b84c35 SHA-1: 6094159a1f8cfd0ea2a00fb8d97d0df6b71a197f SHA-256: c6dfee63280efa0dbc2233e3d2d3e7ab0f444f0dc77d5722383bd04c069171a9
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 game hack lure, directing users to a URL that is flagged as a malicious redirector. This indicates the document's primary purpose is to trick users into visiting a malicious site, likely to download further malware. The embedded URL 'https://netcdn.xyz/app/431946152/how-to-hack-and-get-free-robux-game-hack' is the main indicator of this malicious workflow.

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/how-to-hack-and-get-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_003_off00003305.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3305 25152 bytes
SHA-256: 5cf8b8e980f442e0381c5dce89cb07bddb4f54ded3804cefbeb1fdc461894452
font_01_sfnt_off00006cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 18856 bytes
SHA-256: d1af75e50eba08e00cb44d21026f4cdbf29920fa5250f1112d9d0eb56b6eb802

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