Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb462ca7b464d2ae…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 02:49:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ae421ee81c55a25c425afe19b6fa88d SHA-1: 5d6b48b6dc93569ddcc7876b026e501bb0cbef9f SHA-256: bb462ca7b464d2ae1638a44c60caf54e0a203455a76833d42609b428ea0b0786
82 Risk Score

Malware Insights

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

The PDF document contains embedded links and text that mimic game-related content, specifically 'how to crack a password on Roblox'. The presence of multiple URLs pointing to similarly named PDF files suggests a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the heuristic for running commands indicates a potential for script execution within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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.
  • 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 https://netcdn.tw/app/431946152/how-to-crack-a-password-on-roblox-without-hacks-game-hack
    • http://www.art-concept.gr/images/how-do-you-get-roebucks_GM431946152.pdf
    • https://art-concept.gr/images/roblox-hack-free-robux-pc_GM431946152.pdf
    • https://art-concept.gr/images/how-to-change-name-on-roblox-for-free_GM431946152.pdf
    • https://art-concept.gr/images/neruc-icu-roblox-hack_GM431946152.pdf
    • https://art-concept.gr/images/roblox-scrip-super-poderes-no-hacks_GM431946152.pdf
    • http://www.art-concept.gr/images/coin-master-daily-free-spins_GM406889139.pdf
    • http://www.art-concept.gr/images/free-coin-spin_GM406889139.pdf
    • https://art-concept.gr/images/cmds-hacks-roblox_GM431946152.pdf
    • http://www.art-concept.gr/images/free-robux-group-payouts_GM431946152.pdf
    • http://www.art-concept.gr/images/spin-and-coin_GM406889139.pdf
    • http://www.art-concept.gr/images/coin-master-hacks_GM406889139.pdf
    • http://www.art-concept.gr/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://art-concept.gr/images/roblox-dll-hack-file_GM431946152.pdf
    • http://www.art-concept.gr/images/get-free-robux_GM431946152.pdf
    • https://art-concept.gr/images/hacks-para-roblox-2021-may-cualquier-juego_GM431946152.pdf
    • https://art-concept.gr/images/earn-free-robux-for-roblox-robloxwin_GM431946152.pdf
    • https://art-concept.gr/images/hack-codes-for-roblox-rb-wolrd-2_GM431946152.pdf
    • https://art-concept.gr/images/roblox-superhero-tycoon-free-online_GM431946152.pdf
    • https://art-concept.gr/images/how-to-hack-a-server-on-roblox_GM431946152.pdf
    • http://www.art-concept.gr/images/roblox-phantom-forces-hack_GM431946152.pdf
    • http://www.art-concept.gr/
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ea0.bin
48fb46bf48b9ba60bb1558324c34ee3551322879ef1ab4418ae3e6779794039c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA0 28796 bytes
font_01_sfnt_off00008ff4.bin
602d50fe00eb4e21c94864cf9ce0d457531e67556b489a8df949bc72fd0054de
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 19404 bytes