Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b0cae3fd438e21…

MALICIOUS

PDF

36.2 KB Created: 2021-05-20 22:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22591b8fca0226a16c1cb3947a1d3099 SHA-1: 7ad0bcf867ac81e866b2b396c17d58d52712bf25 SHA-256: 64b0cae3fd438e21b5347f274b0401e2b4c73d58bef04d7bb2e223bfb14eb2f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that redirect to malicious infrastructure, specifically advertising "free Robux" and "game hacks". The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-android-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-android-game-hack In PDF document text
    • http://www.controverseinterapie.it/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.controverseinterapie.it/images/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.controverseinterapie.it/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.controverseinterapie.it/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://www.controverseinterapie.it/images/coin-master-hack-quora_GM406889139.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_off000032d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D7 25236 bytes
SHA-256: 0dee67f9f8ec4b8fa4949a23c60f8f0e60848f95afd7f6eff32b111747436e9b
font_01_sfnt_off00006bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFE 18308 bytes
SHA-256: 3d682ae06d788585f0d48ef4471ddbfed33e391fd6a867cb0ce2fb595824b3ec

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