Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a974171e9b0101…

MALICIOUS

PDF

41.3 KB Created: 2021-04-30 06:47:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f9777e537d3ab32fb2ec6aa406c2d0b0 SHA-1: 10e67f3639b600afd701fb79ca85ed935a402f48 SHA-256: 54a974171e9b0101a78f23ff69df1a6164e8133686e7bd63d8ab08f78bb966b7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game account hacking, directing users to external URLs. The presence of multiple links to 'free generator' or 'game hack' sites, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-into-others-peoples-acoount-on-roblox-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-account-read-desc-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-mod-hack-tool.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-somone-roblox-unpachable.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-payed.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-hack-com-free-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-t-shirt-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-noclip-in-roblox-cheat-engine-64.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/how-to-script-on-roblox-hacks.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hacker-texting-simulator-simulator-roblox-code.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-code-carte-roblox.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_off00004188.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4188 26480 bytes
SHA-256: 4deb8cc9810fe1282b239c9b44d39d42d0ac1e0597c614580f06477393344a40
font_01_sfnt_off00007d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D42 19088 bytes
SHA-256: 38bf9a7e221c15aaa2339ad754245ae4c089de964104c2c58a9e09e12ea452bd

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