Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b37b360c988a8d…

MALICIOUS

PDF

37.2 KB Created: 2021-06-28 12:22:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0ed415e6ac8e15cbccfdaff67d056c1 SHA-1: d41492b4cc4c844c0f194aed142426ca7461f2d6 SHA-256: 31b37b360c988a8d8559f824c85ade5558571d9ade48cde24688a5054a021513
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a primary external URI, all pointing to websites offering game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a deliberate attempt to direct users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/holocene-hack-roblox-game-hack
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-phantom-forces-flame-cheat_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-wall-hack-cheat-engine_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-android_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-gold-cards-coin-master_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/black-pants-roblox-free_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/top-5-ways-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-unlimited_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/real-robux-hack-pastebin_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/rbx-roblox_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/wurst-115-2_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-spin-link-2021_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/rbx-land-free-robux_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-system_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c8c.bin
b5c1a04a6a590bc69c96f65c8be708042f9103f33290f6a7bacfe8f4c45e425b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C8C 22128 bytes
font_01_sfnt_off00006d82.bin
c11b8df51592e6a1da3cf368d8e6a873163e2bbad34b313f1b5714cc10072572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 18656 bytes

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