Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea4af08a074c649…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 22:25:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c147d20b76a0864c867a253bf3ed19aa SHA-1: 47fb791ecff2f070f21e5d8c8db2a594aafb1786 SHA-256: eea4af08a074c649cc96d4b89d22fdbaa78407d1067ccdae32b3d3c4bc8a38ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a known malicious domain, disguised as a 'free Robux generator'. This lure is designed to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/free-robux-generator-without-human-verification-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robloxheroxyz-free-robux_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_off00005329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5329 25672 bytes
SHA-256: c932f804d84254f513869ac1d7712baa8e226d4a413a5fdcb23ae166e5955310
font_01_sfnt_off00008e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E15 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off000097c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 19224 bytes
SHA-256: 40a7d61fbe05f3c06cc4b4f213318e5db23b17d00e7c534d307fd6e415ac6071

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