Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e71c94c40beb92…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 09:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 37eaeb7944185eb7a745f1225dc799f3 SHA-1: c9002ebfb6edb8382b7e35f10cab3813b57000fb SHA-256: e6e71c94c40beb923da381383a68425ac5dbf34169c0572543621e3546a9256b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that appear to be part of a link farm, likely designed to attract users searching for free in-game items or currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a link farm heuristic indicates a deceptive intent. While no scripts were extracted, the document's structure and embedded links suggest it's a lure for phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/is-minecraft-realms-free-game-hack
    • http://lc.pustaka.unand.ac.id/repository/oprewards-com-robux_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-cheats_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/spin-free-coin-master_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/roblox-help-free-robux_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/coin-master-daily-rewards_GM406889139.pdf
    • http://lc.pustaka.unand.ac.id/repository/free-robux-no-scam_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/free-robux-no-human-verify_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://lc.pustaka.unand.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053a4.bin
f19bcbb2786f0c33beea891d995b2b734befbe450139b02a134b000bd27b7391		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A4 24160 bytes
font_01_sfnt_off00008a4f.bin
d94e88f400a91da589c267152ab3bcd3a3c7a79749ad17c8252b3458dd298181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4F 17900 bytes

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