Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d06395b08898837…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 14:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 314c8af368a6b039fa6a4af5b575715f SHA-1: 16551e30ca52081fd80971e5a886a6aff67d6522 SHA-256: 6d06395b0889883738e821e9f6a022c019e2326c667f48cdd790913c6da16de3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and free in-game currency. The document body also contains a URL that likely serves as a lure for users seeking cheats or exploits. The presence of numerous links suggests a link farm or a distribution point for further malicious content.

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/why-old-roblox-accounts-and-free-items-game-hack PDF link annotation
    • https://www.yantan.com.tw/upload/files/free-robux-giver-no-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-phantom-forces-hacks-fly_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/robuxian-tutorials-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-phantom-forces-anti-cheat_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-someones-roblox-password-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-insert-script-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/hack-coins-pizzeria-roleplay-remastered-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/necklace-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-catalog-admin-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-spins-no-survey_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_off00002f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F64 21328 bytes
SHA-256: 9ccaafc20641a367bc2882962363c44d99cd38afb41bb8a0cbacdc2831f12345
font_01_sfnt_off00005de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 19872 bytes
SHA-256: 8b5ef6448fe226b9ff60657be5d9bfe3f34dc6776e2249955a3bd16e4c492f31