Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1d55c0058b05a4…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 08:25:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 77d7587967067c82abbc2d8c21cbfac4 SHA-1: 5b5cc673797bd6ce84228fe441c7a99969fb0cd8 SHA-256: ee1d55c0058b05a429193ad9d1518a9537485575e4652e408e80d76282891ca2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malware download or phishing. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-spin-link-for-coin-master-haktuts-game-hack In PDF document text
    • http://library.umla.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CF 24704 bytes
SHA-256: 6816c1732c67141a6216e064129961ec109a846deedafc9e35fa9972342bb8b8
font_01_sfnt_off00008968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8968 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off0000948c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948C 18196 bytes
SHA-256: 059040c70b7e1623cc802a78fc9a4c62b0b07acde00f6a5c29b37c3e020e38f1

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