Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f2a5dde23bd994…

MALICIOUS

PDF

34.9 KB Created: 2021-07-10 01:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d5c28716850427a1577039699b41e8dc SHA-1: 094c7fb19719be05c001298dd75eb955388144b8 SHA-256: 98f2a5dde23bd994f27db1e3bd4f8c42392eac5c2ed82fc20eacd8e417bf7e9e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and suggest the download of game hacks or cheats. The ML classifier strongly indicates maliciousness, and the presence of a link farm heuristic further supports this. The document body and extracted URLs point towards a social engineering tactic to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-tool-2021-game-hack
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-coins-hack_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/sign-in-to-roblox-for-free_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-android-1_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-spins-ios-2021_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-robux-free-no-human-verification_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-hack-peoples-passwords-on-roblox_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-spin-hack-no-verification_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/minecraft-bedrock-free-with-java_GM479516143.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-models-for-roblox_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/increible-hack-robux-pastebincom-80b1sjzp-davidtoasa_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/roblox-studio-someone-hacked-my-game_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-coin-spin-daily-link-net_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031d6.bin
5c84c504d41dd3ee94ddcc6111ad89d2d884a8f77aa31381881f32f920e542ba		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D6 22896 bytes
font_01_sfnt_off00006533.bin
3dc977bc1210ceeedde7f87719dab6f525ca5e29bcd32cbe92ee8e1a0ab21cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 18480 bytes

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