Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd64c04ae3c6d5b1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 22:36:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe4a229873f634ae4d24a9482643632c SHA-1: 6bdb423eb3e5153b26ba8cf047911c842da1a616 SHA-256: bd64c04ae3c6d5b1eb24452b228e7f5e300d30831d9fb8a5ea7c925f2c65ef9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/how-to-gift-robux-on-mobile-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting the intent is to trick users into downloading a second-stage payload. No scripts were extracted, but the presence of embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-gift-robux-on-mobile-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-tony-stark-tshirt_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-build-a-boat-for-treasure-hacks_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-2021-late_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-veiculos-simulator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-ipad-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-promo-codes-roblox-2021-june_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-hack-descargar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pastebin-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-hacked-account-back-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-roblox-2021-descargar_GM431946152.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_off00002e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9B 22272 bytes
SHA-256: 69aa0850596b512ca471dae9459e3be6e5a70727a4b201b6fda7f89c3134be55
font_01_sfnt_off00006036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 19212 bytes
SHA-256: bc5fdf2573ba02d8ebbd4383ba1ec7dafda423df0baa75127e805848098bb58d

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