Malicious PDF — malware analysis report

Static analysis result for SHA-256 77129e84fd01df24…

MALICIOUS

PDF

42.9 KB Created: 2021-04-27 21:42:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5329909cccb1b3d312765c3fd1d6127d SHA-1: 2033bc01935cacd83de7bd7cfb738c3835952c0a SHA-256: 77129e84fd01df24f9f5d90595903eb961291a20bdb1698d1edf922e25e58979
122 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Facebook, directing users to a URL that claims to offer a Roblox hacking tool. This social engineering tactic, combined with the presence of multiple suspicious URLs, strongly suggests an attempt to trick users into downloading malicious content or providing credentials. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-hack-roblox-safe-game-hack.
  • 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/how-to-hack-roblox-safe-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-jailbreak-speed-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-codes-september-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/paginas-para-hackear-en-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-on-roblox-skyleree.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-exploit-gui-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-glowing-beach-skirt-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-download-free-hp.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-accounts-usernames-and-passwords-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-lv6-free-trial.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-catalog-items-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42E4 30120 bytes
SHA-256: 13962d61b14f10a36705dbcf98a9d3c4aa6ff42f85580e194132be3dfeb0f10b
font_01_sfnt_off000085a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 18344 bytes
SHA-256: ba996fecab7e5eafec927cad93ab712687601bd23bbc9c7bdba831fb41d8a2b0

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