Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42920bd1a6f29ed…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 15:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 87ab037ac9505963e0f5b3ff85d2b2e0 SHA-1: d09416cc0f4e306ff22d2b7c155ad087df7e6793 SHA-256: e42920bd1a6f29edd354c8e90f4727c4b4289a97319e8dfcb58c1d53d927b312
82 Risk Score

Malware Insights

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

The document contains numerous embedded URLs and a visual download button lure, suggesting it is designed to trick users into downloading malicious files. The heuristic for password-protected archives further indicates a payload delivery mechanism, likely disguised as game-related cheats or hacks. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/inspect-element-hacks-for-roblox-game-hack PDF link annotation
    • http://library.stembi.ac.id/repository/skin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-robux-no-fike_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-xbox-one-free-download_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-beta-warships-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/bloxburg-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-vip-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-do-you-make-a-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-4k-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/cheat-roblox-abeille_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/fake-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hack-apk-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-cheat-engine-detection_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-pin-generator_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-captain-underpants-game-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-change-your-username-on-roblox-for-free-mobile_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA8 22376 bytes
SHA-256: 297be43928310d3db5822667cdbd0075ba9f3627296cf7a920c4092ad4e87b21
font_01_sfnt_off00005f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 19360 bytes
SHA-256: 08c711cb6af6cd66c339c4602528cb9eb2e81bed9465177175b0d5c34acb515b

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