Malicious PDF — malware analysis report

Static analysis result for SHA-256 243d80ee8b45bb19…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 11:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da26531c1674704d13eb1c737202253b SHA-1: ac7f5aa539af3541c1554fd9d5002f826ad0cf73 SHA-256: 243d80ee8b45bb196b96119c1e332c059fbf4b65fba544f7ad5773ba897dc152
82 Risk Score

Malware Insights

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

This PDF document contains multiple invisible links that lead to CAPTCHA-themed web lures, designed to trick users into believing they can obtain free virtual currency or game items. The ML classifier strongly indicated maliciousness, and the presence of numerous URLs related to 'free robux' and game hacks supports a phishing or scamming intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/roblox-free-bots-game-hack
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/can-you-get-free-robux-from-the-file-explorer_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/minecraft-pocket-edition-free_GM479516143.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-toy-codes-roblox-2021_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-thomas-wooden-railway-free-demo_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-red-boy-hack-download_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-robux-avatar-with-private-group_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-robux-giveaway-live-2021_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-robux-no-captcha-or-human-verification_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free_GM479516143.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/robux-follow-free_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/wings-image-roblox-free_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/no-clip-hack-roblox_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-models-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000339f.bin
4c4f2111a084aa24709bef25ea770c84b9ca606e76d5e697a7b38ed8cbc4bd7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x339F 22396 bytes
font_01_sfnt_off000065c3.bin
f5f6713c034f5ad67d5be6b19724555a1d9a6292c1856ba47d802e411d206b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C3 18752 bytes

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