Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5eb8e5a6b181d3c…

MALICIOUS

PDF

47.4 KB Created: 2021-06-11 04:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e559cbbf3631b5efb0041336e91ab7f3 SHA-1: c96404fc34f675a5f43964bf289ff2b6163b2b46 SHA-256: e5eb8e5a6b181d3cd7a5cb592983bcd7c66e06d3d339f70dfa5a61cdbf5259ab
82 Risk Score

Malware Insights

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

The document contains a lure for free in-game currency, specifically mentioning 'Robux', and includes a URL pointing to a potential download. The presence of a 'Password-protected archive handoff' heuristic suggests the user is instructed to provide a password, likely to decrypt a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/comment-avoir-des-robux-gratuit-sur-pc-hack-game-hack
    • http://lib.uho.ac.id/library/repository/cm-spin-link_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/roblox-svg-free_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/tiktok-free-view-editor_GM835599320.pdf
    • http://lib.uho.ac.id/library/repository/tryrbx-site-free-robux_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/4-million-robux-free_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/roblox-com-robux_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/toolbox-mod_GM479516143.pdf
    • http://lib.uho.ac.id/library//repository/roblox-comroblox_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/roblox-fun-com-free-robux_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/coin-master-hack-blog_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/coinmaster-links_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/free-fire-coin-master_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-computer_GM479516143.pdf
    • http://lib.uho.ac.id/library/repository/xray-for-roblox-for-hacks_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/free-robux-real-working_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/how-to-download-minecraft-hacks_GM479516143.pdf
    • http://lib.uho.ac.id/library//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005299.bin
9d779761c6c069a80d95d92569b92aa77cd1dd0def7462aabeeaa17687d144ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5299 24588 bytes
font_01_sfnt_off00008a5b.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 2820 bytes
font_02_sfnt_off000093fb.bin
396fd9599bfca95530c05ae289e730c9fbbdad915f226015a01a8103b9a03ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93FB 19168 bytes

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