Malicious PDF — malware analysis report

Static analysis result for SHA-256 35be73f751ea4639…

MALICIOUS

PDF

39.8 KB Created: 2021-05-13 18:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9b2b39ed8083e9bc1432bb6c04b6cb84 SHA-1: 8ca53e84c14843e6b46f3ae4a72899e61daf9253 SHA-256: 35be73f751ea4639d63caa62b734df1d66679e54e2aba0347e28c72616ea49a7
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website promising free game currency, a common lure for phishing or malware distribution. The heuristic firings indicate the links point to known malicious redirector infrastructure. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate redirects or further malicious actions.

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-get-free-robux-without-verification-game-hack In PDF document text
    • https://collectrobuxIn 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_off0000327b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327B 30992 bytes
SHA-256: 291cc0977de015e692eaa556c8e8d43c44cb4b7ea15dc9d0babc1153cecdf9cc
font_01_sfnt_off00007804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 19128 bytes
SHA-256: fe2fba94a2d86c9c71a87afecb14f9f9cb432365285dbf62d8027955010708b1

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