Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4394ad70bbfc70…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 05:03:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cf27a9e2e0531e90600e838d5a823bbe SHA-1: ae5931bf860960623a4783b6a97b089af933a93a SHA-256: ba4394ad70bbfc707d35e9bfd589d70f69f7beeceaff20ea5291c4f6a14b5677
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a lure for 'free Robux' and game hacks, directing users to external URLs that are likely malicious. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a callback lure heuristic further supports a phishing or scamming intent. No scripts were extracted from this sample, but the overall pattern suggests a phishing attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-get-free-robux-2021-game-hack
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-11_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-account-generator_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hack-tuts_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-fast-ways-to-get-robux_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-domain-for-minecraft-server_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-spins-apple_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-hack-boku-no_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-roblox-accounts-with-obc-2021_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-play-for-free-without-downloading_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-com-real_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-free-items-2021_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/master-coin-hack-mod_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/kicked-by-server-roblox-because-of-cheat-engine_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/comment-avoir-des-pices-dans-roblox-avec-cheat-engine_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003133.bin
6d9bcbde385ffbb9e760792f5fe72a323e5b1461bf85d646846f99fcbe78ae78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3133 21980 bytes
font_01_sfnt_off00006105.bin
140efaa19506918d6e23c6f72929d04436b836b18eb9dc717a4a442c24a9fe38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 19384 bytes

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