Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbc9059ddd95e46…

MALICIOUS

PDF

33.6 KB Created: 2021-06-26 16:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7b7f829c36a0770a5c6c4c034bf85515 SHA-1: 538503bd2b9a811b4ea68d221af2eb44649a0a16 SHA-256: 3dbc9059ddd95e46f8633d70bc88e219dc71a837fff57e5c60efe40e2388da5e
102 Risk Score

Malware Insights

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

The PDF document contains a lure for a Roblox cheat tool, indicated by the document body and multiple embedded URLs. The heuristic PDF_SEO_LINK_FARM firing suggests a large number of links were generated to appear as legitimate content, likely to obscure the malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that it is designed to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/cheat-roblox-pet-simulator-game-hack
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/is-roblox-free-on-pc_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-hacked-accounts-list_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-links-for-coin-master-2021_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-work-at-a-pizza-place-cheat_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/cmaster-club-coin-master-hack-tool_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/robuxmatch-com-free-robux_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-ot-get-free-robux-not-clickbait_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-really-hack-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c84.bin
1d58d5f58760792dcc13af75eb4cd84070a55e83ea21b52c04af14e4c6cbee03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C84 22208 bytes
font_01_sfnt_off00005ddd.bin
98f233ca617cde77c99d533a2fa75db5d51318029fce875459ba3100f89e6f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDD 19428 bytes

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