Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef091c719f0f7c5c…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 10:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e93d3f24dda352324646b891ef13c5a SHA-1: 3d043487db2168c9ee1fa9aabc499043f9648d61 SHA-256: ef091c719f0f7c5c816fe4bbbfbd81858f52a0409744a3c2a3bedb198f5b487a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promises 'Robux Hacks That Actually Work 2021', indicating a lure for users interested in obtaining in-game currency or cheats. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic and potentially distribute malware via SEO-optimized links. While no scripts were explicitly extracted, the presence of external URIs and the ML_NYX_PDF_MALICIOUS firing strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

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/robux-hacks-that-actually-work-2021-game-hack
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-clothes-for-free-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-card-codes_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hair-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-help-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-headphones-on-roblox-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/get-free-lives-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-only_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/cheat-engine-no-longer-works-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-hacks-scripts-in-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-cheat-in-fame-simulator-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-phantom-forces-all-guns-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-doge-hat-for-free-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-no-down-load_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-coins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/dungeon-quest-hack-download-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-items-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-the-hacker-egg-in-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7e.bin
5abc7015af2f0e27485ee35935a43acaff002f3eb75b894e3c75525e5370110d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 22156 bytes
font_01_sfnt_off00006072.bin
a536e0f8d3f66a80024eacac7196b1bc2a1b9feb0572f502fa84f5889816e6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 19848 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.