Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed6c57a543e22f6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 22:47:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1d54d89587388b33a548875177e2db91 SHA-1: 504b937064a15b3aacca32c49c3e80875ef8d06a SHA-256: 4ed6c57a543e22f6d3e112f9bea7d4e6a76a1d5a121803bcf20bbdff0dc88ae1
62 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and references to 'free Robux' and game hacks, strongly suggesting a lure for users to download further malicious content. The ML classifier and heuristics for external URIs and IP literals further support its malicious nature. The document's content and structure indicate it's part of a phishing campaign designed to trick users into visiting malicious sites or downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/claim-gg-free-robux-game-hack
    • http://202.56.165.220/digilab/repository/free-admin-hack-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-try-of-new-modle-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-money-cheats-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/slup-roblox-hack_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/how-to-trade-in-roblox-for-free_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-10-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/noclip-hack-roblox-jaibreak_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-gifts_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/robux-free-unlimited_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/synapse-roblox-free_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-prevent-your-roblox-game-from-getting-hacked_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/roblox-promo-hack-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/rblx-gg-free-robux-without-human-verification_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/noclip-hack-for-prison-liferoblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-robux-update_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f6d.bin
0d9ff8b06ae888b74e011d86f75546b1e368456604100797b0d699fb0c31a052
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6D 22496 bytes
font_01_sfnt_off000061a5.bin
2362c95d5f9c36a69ccc9bb0a02a2e14dff77a2a21d49e742691bac5a89e0773
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 19168 bytes