Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cea017bc357523…

MALICIOUS

PDF

33.2 KB Created: 2021-06-19 18:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 318d197557ad6d49b4587f938332d585 SHA-1: df325581d99dc27e65324b59ab8342ba6c6ae249 SHA-256: 80cea017bc357523e623784d1b4180edd553710075988c8a04c8e2204ae87b08
102 Risk Score

Malware Insights

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

The PDF contains a large number of SEO-optimized links, many of which point to game-related hacks and cheats, suggesting a lure for users seeking such content. The presence of a download button heuristic further supports the idea that the document is designed to trick users into downloading potentially malicious files. The ML classifier strongly indicated maliciousness, and the overall structure points to a link farm or phishing attempt.

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/sfx-roblox-hack-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-para-roblox-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hacks-for-no-scope-sniping-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/20210-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-spin-link_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hacks-for-ninja-legends-simulator-for-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/tap-this-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-limited-items-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-robux-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/icloud-the-cheating-app-for-roblox_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-free-robux-hack-tool_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-promo-codes-legal_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/rewards-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-roebucks-on-roblox_GM431946152.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_off00002c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C43 22240 bytes
SHA-256: a9de1fa7e96e09136bd0f1f8e0079a91dec9439d208174fd76c02a2bf8ae96f1
font_01_sfnt_off00005d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 18656 bytes
SHA-256: 6f75dc27cc61dc17b8710426a0e308ba1ec64755a3c0e3fa522662c8ea082350