Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b24e8a154fd8ca…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:14:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b95b2f9f37f52a6993523cdbf34c6151 SHA-1: 1f3ea0736d896b7f517356ce506c6c0fe26ce0a5 SHA-256: f8b24e8a154fd8ca6a3b66a82cc0edab971cb9678c015bb3e8158021bba46a85
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and references to 'free Robux' and 'hacks', indicating a social engineering lure. The presence of embedded URLs, specifically http://netcdn.tw/app/431946152/make-free-robux-game-hack, suggests an attempt to redirect users to a malicious download. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/make-free-robux-game-hack
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-in-minutes_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-codes-that-are-not-used_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-four-free-items_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/get-free-robux-now_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-prison-life-hack-download-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/2021-robux-hacks-no-games-to-be-played_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/loith-gaming-free-robux-no-waiting_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/no-hacks-working-on-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-menus_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/como-hackear-robux-en-roblox-facil-y-rapido-en-celular_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-accounts-v3rmillio_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/pastebin-robux-free-birthday-reward-7_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-cheats-pris_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/pison-club-roblox-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-trailer-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/3-roblox-hacks-you-need-to-know_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-free-exploits-v3rmillion_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/descargar-hack-para-roblox-dragon-ball-rage_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-code-for-huge-cat-pet-in-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/como-hacer-un-hack-para-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e8c.bin
579972b467e80324ae326b1fa28c0f5fbf02c8e1f3a2a8195be4c6488dd250a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8C 22560 bytes
font_01_sfnt_off00006074.bin
480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675
pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 19084 bytes