Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc53b56f67c3788…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 00:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 814b4c80f2b089a48dcb508070b9202d SHA-1: 5decf4b4c45e2714ad8bfba84e1334f8ea8f0803 SHA-256: 8bc53b56f67c3788fdaa7e7ac9cc073e9ee4e9abcd7b0a31d5fd98db5d0d704a
82 Risk Score

Malware Insights

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

The PDF document contains numerous URLs and text referencing game hacks and cheats for popular games like Coin Master and Roblox. The presence of the 'SE_LOLBIN_RUN_COMMAND' heuristic firing, along with the URL 'http://netcdn.tw/app/406889139/how-to-hack-coin-master-game-hack', suggests an attempt to trick users into downloading malicious files or visiting compromised sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/how-to-hack-coin-master-game-hack
    • https://www.elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-change-date-of-birth-hack_GM431946152.pdf
    • https://www.elearning.tawakkal.sch.id/__statics/gudangsoal/files/hacking-codes-for-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdf
    • https://www.elearning.tawakkal.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/what-is-the-cheat-t-get-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/get-more-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/minecraft-education-edition-free-download_GM479516143.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-lua-scripts_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-accounts-roblox-passbin_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/cmd-hack-roblox_GM431946152.pdf
    • https://www.elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-hack-jailbreak-roblox-on-ipad_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-not-scam_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdf
    • https://www.elearning.tawakk
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003017.bin
aed313896767a467f51f2eb9916597fbf90d0786ce63a62fef279d2eba6a5a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 22196 bytes
font_01_sfnt_off00006106.bin
2bd458773159c42ddb973016f08b2d4d6bea9039625adade8827a8f393a5a95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 18168 bytes

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