Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c15f0667e0070b0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 04:21:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5625bbb8144183256709a06507797ca1 SHA-1: aadc871429210123ae789052c1dbc55fce82b392 SHA-256: 0c15f0667e0070b04838f99c2c17b990eab43a2c742301816690fe8df2b409c6
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are SEO-optimized pages offering game hacks and generators. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to direct users to download malware or engage in scams. The document body and extracted URLs suggest a lure focused on popular games like Roblox and Coin Master.

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-generator-no-verification-2021-game-hack
    • https://www.yatrikathmandusuite.com/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/get-free-robux-generator_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/hack-my-spins-coin-master_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-raid-link_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/pubg-uc-visa-card_GM1330123889.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-card-hack-2021_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-no-verify_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/robux-free-com_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/win-free-robux_GM431946152.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-hack-a-minecraft-account_GM479516143.pdf
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313e.bin
43c65d0bb8f67e7b358d68eb2a83e486d886ec55eb74479b88d9af68f0e809f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x313E 22256 bytes
font_01_sfnt_off0000626d.bin
422264a0cdeadcdb3e2ce6070f5cb4f9bd6f0b6f51af0cd9a99234ab5f0c0b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626D 19476 bytes

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