Malicious PDF — malware analysis report

Static analysis result for SHA-256 4236a9ad1a49ef6f…

MALICIOUS

PDF

37.2 KB Created: 2021-05-20 18:57:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b055b5cfb5b77b3f7f1aacb884f27b1 SHA-1: 8c354799bc5468ba0c6991cbcb86bcad6be33f9e SHA-256: 4236a9ad1a49ef6f8fa414f8e4acfdabec3acbd410f3bd12aea6a5de9303c2ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' and 'game hacks'. The ML classifier also flagged the PDF as malicious. The embedded links likely serve as a lure to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-pin-codes-game-hack In PDF document text
    • https://newenglandafs.com/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/get-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.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
font_00_sfnt_off000033d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D0 26556 bytes
SHA-256: 13ccec8922270fa79f4647de17dd66b413026c2559b270e346a2cfb2a9a4c788
font_01_sfnt_off00006fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB3 18464 bytes
SHA-256: 23872266a6577b01853888d52c04c526ac323517b7f86f8cb64f3b9e81653507

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