Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3bdb33003d5d46…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 08:31:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 86daf8d22893fa766fd95231854d7260 SHA-1: 3c459e22b798d1b35fa668886de9fa6d3c289286 SHA-256: cb3bdb33003d5d46fd2fc62342ce47dba38141aa349c82b2427b0cacb36c5cc9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The document body and extracted URLs suggest a lure for free game hacks and in-game currency, likely leading to malware downloads or phishing. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates a potential for further compromise.

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/479516143/minecraft-ps4-free-game-hack
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/real-hack-for-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-cheats-codes-and-hacks_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-make-a-free-account-to-change-how-you-look_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-roblox-clothes-temp-downlode_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/100-free-coin-master-spins_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/can-someone-hack-you-if-you-sent-message-on-roblox_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/marshmello-roblox-t-shirt-free_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-free-without-installing_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-robux-no-human-verification-or-download-or-survey_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/kazok-free-robux-game_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-roblox-accounts-with-lifetime-obc_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/minecraft-realms-free-codes_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/mcpe-download_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-free-zombie-face_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/minecraft-apk-download-free-11-055_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-get-free-t-shirts-roblox_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-hack-somebodys-roblox-account_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-2021-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003385.bin
9e2f86efbb4ac3044ec38a9f978ff1475764c22fb224bd8f1d5e25fe3ea8beae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3385 22264 bytes
font_01_sfnt_off000064b5.bin
07bff6b201fefb5b79bda7bcb703d65895bb3fadc7074254717ea8518f49b268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 18072 bytes

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