Malicious PDF — malware analysis report

Static analysis result for SHA-256 e400ee822f14f2c1…

MALICIOUS

PDF

48.7 KB Created: 2021-05-11 06:44:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5c37f1b89316e7e0fdd882c06bf51714 SHA-1: a98222662f38682d768caec9714ed5b1bc84b220 SHA-256: e400ee822f14f2c1f1fa268ce35977f7b0ecdc425e83da283d05c6d7e0b935b3
62 Risk Score

Malware Insights

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

The PDF contains embedded links and a call-to-action button, directing users to download files from external URLs. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to game-related lures like 'Free Roblox Intros' and 'free-robux', suggesting a social engineering tactic to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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.xyz/app/431946152/free-roblox-intros-game-hack PDF link annotation
    • http://118.174.0.244/UserFiles/File/free-robux-giveaway-live_GM431946152.pdfPDF link annotation
    • http://118.174.0.244/UserFiles/File/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E5 26652 bytes
SHA-256: de3fdd11ec63e7410c95c3415bde3531892fe3d13bfd30f7f5c3287071966c77
font_01_sfnt_off00008829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8829 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9209 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C19 18052 bytes
SHA-256: 96373f35ee075c3be11c8e4c64eb77f13cb7d9769cc235bfbcc2c5e9d23a424f

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