Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3f07e34f939cb3…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 00:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76d2251ddf291cb833a81a6d6f28c789 SHA-1: bbe020395e99d1a57b7e55862c22c39bb6e7c014 SHA-256: be3f07e34f939cb37a75fe3c2008a6fb748f8987422da18dec90c4c3259e896c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising 'free Robux' and 'game hacks' to lure users. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-human-verification-and-no-survey-game-hack. The document body, though partially corrupted, also contains references to this URL and similar lures, reinforcing the social engineering aspect. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-no-human-verification-and-no-survey-game-hack In PDF document text
    • http://bgnails.nl/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-hacks-pc_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
stream_003_off0000486e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486E 25256 bytes
SHA-256: 80f6371f563589c307742c7d5bcd03ebe80ad3984aa13b35a0172800d0a253c6
font_01_sfnt_off00008300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 19328 bytes
SHA-256: d2b84e9593d62b74a5e72ac2cd252f85880eba3e829d4f4451320fa49886136c

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