Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e628bd4a645e87…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 07:57:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce425303c9e57405bfc3ee7b1cce24bc SHA-1: 4dac5c8941965bb356479f4303e178fc6f9f7806 SHA-256: 87e628bd4a645e8795cdccc75e4ca7a267bff566453ab1040e54d9df8338c20b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically http://netcdn.co/app/431946152/free-robux-hck-game-hack, which is presented as a lure for free game hacks or Robux. The document body and heuristics indicate a social engineering tactic to trick users into visiting these malicious URLs, likely leading to further malicious downloads or phishing attempts. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a malicious workflow.

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.co/app/431946152/free-robux-hck-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-card-pins_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-games-that-give-you-free-clothes_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-island-royale-cheats_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-change-your-chat-colour-in-roblox-for-free_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_off00003090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 22924 bytes
SHA-256: 7365af25673efcbcad98376e1e1c0e2a75c6ee1e2f20d41cfef16ae68551dce2
font_01_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 18884 bytes
SHA-256: 322e88775b41114dcff55cb0aa178ea79294bf35686bc2b35f7eeac4bbbf247a

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