Malicious PDF — malware analysis report

Static analysis result for SHA-256 36dd3091dfce27b5…

MALICIOUS

PDF

33.1 KB Created: 2021-06-28 20:28:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56f6633628f1fda4fe4168ed5687639e SHA-1: 2a99d9fdc8501a22b05fad9d0e59854773cf4b31 SHA-256: 36dd3091dfce27b5be5827c3c31a9f71b6c46b041899d1feb9e0851b364907a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free currency. The primary malicious link is http://netcdn.co/app/431946152/robux-hack-promo-code-game-hack, which likely leads to a phishing or malware distribution site. The document's content and embedded links strongly suggest a social engineering tactic to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/robux-hack-promo-code-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/uirbx-club-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-assassin-free-vip_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/musical-chair-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-accounts-full-with-roebucks_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-shaggy-old-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-no-survey-or-human-verification-no-downloads_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-link_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fastbucks-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-2021-videos_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A47 22328 bytes
SHA-256: ac3fc49179392d2ea65d55b96ea353b24acae6d1b2fb89d8f4c1412eac0196b3
font_01_sfnt_off00005be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 19308 bytes
SHA-256: e38d95ca4bbc408b4cda94002b623d335097548db9c482d102fec21dc62e308c

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