Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cfef80e2f63a64…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 13:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5fb3c0c0ed46c61130181daf808b51e8 SHA-1: 6f5e7fe2835740086e9293b33db1874ab9606def SHA-256: c4cfef80e2f63a6464d62bc015bb1190a8c88ffa3c12483d7baedef6d836ebb2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains numerous embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, directing users to sites offering free in-game items for popular games. The document body explicitly mentions 'How To Get Free Hair In Roblox 2021' and includes a direct link to 'netcdn.co'. This suggests a phishing or scam attempt designed to trick users into clicking malicious links, potentially leading to credential theft or malware downloads.

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.co/app/431946152/how-to-get-free-hair-in-roblox-2021-game-hack
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-safari_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-free_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox-2021_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-for-roblox-pc_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-2021_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/noob-vs-pro-vs-hacker-roblox-pet-simulator_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-roblox-passwords_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/best-way-to-get-robux_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-link_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/create-free-group-roblox_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/apk-coin-master-hack_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdf
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-windows-10-mod-menu_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003233.bin
16ba6a96c6b93eb8417e156e342c5f412401555102efa8de5dccd86e0b95426b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3233 21868 bytes
font_01_sfnt_off00006270.bin
0d68c11a1e480a23d44c9d7b250839eadfe17b35583ab92c3857c8d9ff35fa51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 19440 bytes

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