Malicious PDF — malware analysis report

Static analysis result for SHA-256 d817545faa92e2d9…

MALICIOUS

PDF

38.3 KB Created: 2021-05-22 23:39:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3e0ed71076853299da5ef17af22532d8 SHA-1: ffd41c7d21678a63404b6129495838e97aaa9fbc SHA-256: d817545faa92e2d9f9369626a7f3f27ca14014d8752d42c9419356772bd05f15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The document body and heuristics indicate a lure to a website that likely hosts further malicious content or exploits. No scripts were extracted, but the embedded URLs and redirection heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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-codes-2021-game-hack In PDF document text
    • http://cacpglobal.ca/images/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://cacpglobal.ca/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/microsoft-robux_GM431946152.pdfIn 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_002_off00003254.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3254 29972 bytes
SHA-256: 2234a287e2c14520b1f49a7bb74cddd0f4e20b40edfdd9c4bbd8bd2b9e3d8f69
font_01_sfnt_off00007346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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