Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0cd29e7a49e83f…

MALICIOUS

PDF

35.4 KB Created: 2021-06-30 09:57:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 165eee276b7b28a55412e96780dcae61 SHA-1: 6a5483da0e0c2056b4d894bfccfbf1b9ad9beae6 SHA-256: ac0cd29e7a49e83f2c53b0ed15c75478139160e6d571a3e51c678676b7f90eec
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links and a primary URL that promote free in-game items for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious download sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/how-to-get-free-hats-and-gear-on-roblox-game-hack PDF link annotation
    • https://anshingtek.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-bee-swarm-simulator-free-diamond-eggs-codes_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-free-shoulder-accessories_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-games-with-free-boombox-2021_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-use-a-script-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-roblox-no-sign-up_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/what-are-some-free-roblox-reedem-codes_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3274 22552 bytes
SHA-256: 99dc34b2fd3dd28a2f566088bc5fcd41b087bbb8c225a2c5c505ccec54889582
font_01_sfnt_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 19092 bytes
SHA-256: dc922fccf1b87c65796797b7c7ea96f2a9e06b2161ad2fd9d8a1ba4b5ee3aea2

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