Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4594be5ff0a27e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 07:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5df11dee5a598b4395003a877d7e4596 SHA-1: 2c3b2b6fc06a4873148cb66fac89f73b7ed55f84 SHA-256: 4b4594be5ff0a27ef72ecee2414587e2b1f3b14367679037b085fa93d98e0b6c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic suggests a large number of external links, likely to further phishing or malware distribution sites. The ML_NYX_PDF_MALICIOUS score of 0.997996 strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-co-game-hack
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-roblox-giveawayscom_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/tiktok-followers-for-free_GM835599320.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/cheat-roblox-soros-resataurant_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/beautiful-roblox-shirt-template-download-free_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-make-hacks-for-roblox_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-jailbreak-speed-hack-new-code_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/i-forgot-my-roblox-password-2021-hack_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-ways-to-make-your-roblox-avatar-small-rthro_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/hacks-boku-no-hero-roblox-vermillion-site-v3rmillionnet_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-free-clothes-no-bc_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-minecraft-alt-accounts_GM479516143.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/descargar-roblox-hacks_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-everything-free-in-roblox_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/los-mejores-hacks-nuevo-en-roblox-jailbreak_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-vip-server-roblox-booga-booga_GM431946152.pdf
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-hack-on-club-boates-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309a.bin
d437ef309154bbb05f4aeec8e71c689b16baec292fa77f455b31373bb93e64eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 23092 bytes
font_01_sfnt_off00006479.bin
ae86725dd70d168e8b5a24377d7effb3bd88f81667aa3e091abc0f5759eb354b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 18716 bytes

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