Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb0c686816fbcd6…

MALICIOUS

PDF

25.7 KB Created: 2021-07-05 17:58:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2870d0982a638753bd68fd7d9a434b9e SHA-1: 1b784d78189c82ab8d732d06e6e076e3c6850fe6 SHA-256: ffb0c686816fbcd6be3cd03d0f2e26b84ec3e38edb0305d45cc75c2f05a3915b
74 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering 'free Robux' or game hacks, indicating a likely phishing or scam attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, potentially to download and run a second-stage payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/freerobuxhack-us-2021-game-hack PDF link annotation
    • http://elibrary.uinbanten.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/hack-de-roblox-admin-descargar_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/comment-hacker-roblox-avec-cmd_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn macro / runtime command snippet
    • http://elibrary.uinbanten.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-use-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-generator-legit_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repositoIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B6 22228 bytes
SHA-256: dc57655acf43dde128871433b66fb8d19c16e8dc69a754cf753eaebfa13f103a

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