Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc0423c8dbc1218…

MALICIOUS

PDF

41.3 KB Created: 2021-05-10 15:30:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f4336b65f4ffb9e3a5a8bdecf5b1096f SHA-1: 641331bcd590d494c0ad48ab5717b4234c296884 SHA-256: fbc0423c8dbc1218c4675393c70a30e509c9848cb5ec79747270e6211d0d5e8d
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a game hack or cheat tool, directing users to download a file from a suspicious URL. The presence of a remote support lure, combined with the ML classifier flagging the PDF as malicious, strongly suggests a malicious intent to trick the user into downloading and potentially executing a harmful payload. No scripts were extracted, but the embedded URLs and the nature of the lure are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9623

Heuristics 4

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/wurst-1.8-9-game-hack PDF link annotation
    • http://origamiperu.com/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/rbx-website_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003cc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CC0 24624 bytes
SHA-256: 0119a7260a5124b04daeaf7d07d6f9f19d62974e819a424cc5706b7c4c4fd895
font_01_sfnt_off00007550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 2972 bytes
SHA-256: 49808d1ebbea3496a3b559a64b6afccfca19b333132c3cd79d9538f309d56574
font_02_sfnt_off00007f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9D 18104 bytes
SHA-256: 5fc5154487e7f43615bf9b199359c3cda4327587017d535d906cde48290ea01c

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