Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a3c9d900f8a7c5…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 00:44:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f72d97ece38032586517a0cd7452044e SHA-1: 186183e454f8bdb8253fc98c80962b41fbba6d82 SHA-256: 45a3c9d900f8a7c5d80cc021cc49f7e19859484c9c76d7dfb0cbb85f2f4796f0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent call-to-action phrase, aiming to trick users into downloading potentially malicious files related to game cheats and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests a deceptive SEO tactic to distribute malware. No scripts were extracted, but the document's structure and content indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/431946152/free-promo-codes-for-roblox-2021-game-hack
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/minecraft-cheats-switch_GM479516143.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/cm-free-spin-link-today_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-skins-boy-free_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/hack-robux_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/100-free-coin-master-spins_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-cheats_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9b.bin
a243a6ed78d17a34122c1c83050cbf10f990554103b90b2265cc6600c976ea49		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9B 24648 bytes
font_01_sfnt_off0000832f.bin
2b6c19c1385541cbc0a307a9e655f394479c142689a532ede3fefaf993bbe264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 18936 bytes

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