Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6cfc2641affbc1…

MALICIOUS

PDF

36.9 KB Created: 2021-06-29 14:46:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ec399ed5582d924b9df8b9781cb62d1e SHA-1: acc25854a297b36fa981815ed88b08e21a3dcd14 SHA-256: 1f6cfc2641affbc1d8b9a7fe028f63cd45aa5250794e36dbad8b55d4eea08878
82 Risk Score

Malware Insights

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

The PDF document contains lures for free in-game currency, directing users to download files from external URLs. The presence of 'cmd_GM431946152.pdf' and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to download a second-stage payload, potentially exploiting vulnerabilities or delivering malware.

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.co/app/431946152/how-to-get-any-catalog-item-free-roblox-game-hack
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/easiest-coin-master-hack_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-spins-coin-master-links_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/coin-master-hack-download_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-come_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-lovenet_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-script-hack_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-hack-with-cmd_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-multiplayer-free_GM479516143.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/genuine-free-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/huskybuscom-free-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-brocken-bones-4-cheats_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfind
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000380a.bin
541d098be93e6371d77562cbd8581845546000ff4cf98011039f8bf40ea59ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x380A 22556 bytes
font_01_sfnt_off00006a56.bin
7a842991d48c16f4f288c6d94d595ca1f59d9fa1cc3dea9370f7edc601c9eb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 19360 bytes

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