Malicious PDF — malware analysis report

Static analysis result for SHA-256 270d7bc31f3072fb…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 22:35:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6374f1733f0e71d9150c993c9623071e SHA-1: b966383dbbb15bd09249a5f34cf7ec714155e883 SHA-256: 270d7bc31f3072fb9dc562f1039bff6ab6c8d311f03cedfc5e1bcd444ddc2c90
170 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links pointing to a known malicious redirector infrastructure, specifically advertising a 'Robux Game' and 'Roblox Generator'. The presence of a fake CAPTCHA heuristic indicates the document is designed to trick users into interacting with these links. The primary malicious URL identified is https://netcdn.xyz/app/431946152/robux-game-game-hack, which is likely the initial stage of a payload delivery chain.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/robux-game-game-hack In PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000351d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351D 29292 bytes
SHA-256: 491a7f99129382c0f11c77d6187e28ebf4ba8790aabd27157542cadf3615514a
font_01_sfnt_off00007819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00008229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8229 18340 bytes
SHA-256: c3384937c05d12942e5ee2f32f048a43efe3336dc3e7ac7a8d2adf4ff389f548

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