Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e1acbfde03f1c0…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 00:05:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5fe216c820e19ffaa1e76dbaf1fccf39 SHA-1: 7cc93447d032a873298915cc2bbe05b0d032a6a2 SHA-256: 20e1acbfde03f1c0f60626239119f2cd04e671c69f1a77b4667deab1b624fb63
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to websites offering game-related cheats and currency. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a deceptive intent. The document's primary function appears to be directing users to potentially malicious or scam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-redeem-game-hack
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-35-11_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/get-free-robux_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/bit-ly-coin-master-hack_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-link-2021_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-games-like-coin-master_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-roebucks_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-do-i-get-free-coins-on-coin-master_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/what-do-roblox-points-do_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-link_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox-premium_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-mobile_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a21.bin
0b68d1c2c418ffbc8de9cb00e7631c69c8037a26da72c03d97b18e27706d72f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A21 25708 bytes
font_01_sfnt_off000083fb.bin
e19fc67664176b3280202982a82ef871938736b971858ad290e21be68fbbdd59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 18220 bytes

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