Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a972378fe26cdb…

MALICIOUS

PDF

35.8 KB Created: 2021-05-21 15:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ca5d4bd2733694db1558e642b6e7933 SHA-1: e6b721827f03863ff7c5392915095ef41baf3323 SHA-256: 29a972378fe26cdb7857b7cdf922404b56e7bb37f536f53e1a99b7172769ca24
160 Risk Score

Malware Insights

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

The PDF document employs a lure related to "Free Robux Generator" and "game hacks" to entice users. It contains multiple embedded links that point to known malicious redirector infrastructure, specifically `https://netcdn.xyz/app/431946152/free-robux-generator-for-kids-game-hack`. These links are designed to redirect users to potentially harmful content or further stages of an attack. The presence of a download button lure and ML classification further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-generator-for-kids-game-hack In PDF document text
    • http://libertad74.com/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://libertad74.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libertad74.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://libertad74.com/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://libertad74.com/images/www-free-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_off00003280.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3280 24480 bytes
SHA-256: f37db4bf08c846041dc09394df71510e2e58452d438a0782eccee41da6b07c76
font_01_sfnt_off0000696f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 18640 bytes
SHA-256: 699ebd5d78640cc812bbb586150daa4d415ceda65572c7c56e250d7f18cab54c

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