Malicious PDF — malware analysis report

Static analysis result for SHA-256 e227f0dffa5e6127…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 05:23:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1df6b6d2a6008f5c52648b2e0889642d SHA-1: 2e469a5cc1cb90aae5112625f7b0802b3e624a88 SHA-256: e227f0dffa5e612796aa9b8d5d9e77c6c41bbc8c7b86922c85cfdd163944dcfe
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a call-to-action phrase, indicating an attempt to trick users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and an IP literal URL reinforces this assessment. The document body, though heavily obfuscated, contains references to 'Roblox' and 'free Robux', aligning with common lure tactics for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/roblox-group-fund-robux-free-game-hack
    • http://202.56.165.220/digilab/repository/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-get-free-groups_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-robux-hack-generator_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-spins-ios-app_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/my-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/robux-offers_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/wahoogaming-co-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-link_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/how-to-hack-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/give-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-fun-hack-online_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-app-for-free-spins_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/free-minecraft-server-maker_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-robux-for-free-2021-without-human-verification_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-spins-in-coin-master-2021_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fb2.bin
741813de4cb04e895459169e3642982d9e1dc1441ee56772c912f1cfbbd31ba3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB2 26216 bytes
font_01_sfnt_off00008ade.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 3884 bytes
font_02_sfnt_off00009785.bin
8fb90139b6863ee3af76b72d1c7689656c49a303b711dc8206f303bd19bff02a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9785 18440 bytes