Malicious PDF — malware analysis report

Static analysis result for SHA-256 685e98baed68a2be…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 12:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 012452cd4f28479acc7280159ed14973 SHA-1: 8d22d27bd3cbc77bc536fc93f088eae3454e2fdd SHA-256: 685e98baed68a2bea33c9932438a759bd39f134ee78d144095cdeee30b65af03
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes 'free Robux' and other in-game items, strongly suggesting a phishing or scam lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely designed to direct users to malicious websites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

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/how-to-get-2021-robux-for-free-game-hack
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/free-bc-roblox-accounts-2021_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/roblox-jailbreak-unlimited-money-hack-2021_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/earn-free-robux-for-roblox-gratis_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/hack-tiktok-fans-free_GM835599320.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/free-admin-roblox-download_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/get-free-spins-from-coin-master_GM406889139.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/easy-coin-master-hack_GM406889139.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/get-free-robux-cheat-engine_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/download-coin-master-hack-tool-v1-9_GM406889139.pdf
    • https://elearning.mialirsyadkotakediri.com/__statics/gudangsoal/files/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003197.bin
e84c3445f67cba07c8a848b346a8a34b66347d177c0d3e2c58324d038a615854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3197 22144 bytes
font_01_sfnt_off0000627b.bin
d24c0e100c944da15398cc03dd439e143cfc9f9497013523985f2333f6259ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 19384 bytes

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