Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b0de64c88e29e9…

MALICIOUS

PDF

40.5 KB Created: 2021-04-22 23:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35995e20ba3955c1619ac98baa32d6f6 SHA-1: 17a6e583daae7b4c9773359193c26bbb3739b52e SHA-256: 19b0de64c88e29e9727b15b1794b1c5f8f71ce211ced196d29309952a50b4299
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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://netsecure.pro/app/431946152/hacking-a-fans-roblox-account-projectsupreme-game-hack PDF link annotation
    • https://www.ukrtrans.biz/images/caillou-hacks-his-robux.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/how-to-get-free-clothes-roblox-ipad.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/free-roblox-website.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/get-free-item-in-roblox.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/oprewards-hack-robux.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/how-to-get-a-free-pet-on-roblox.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/how-to-change-your-username-on-roblox-for-free-mobile.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/multiple-roblox-download-free.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/6x6x6-hacker-roblox.pdfIn PDF document text
    • https://www.ukrtrans.biz/images/roblox-hack-wideos.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
font_00_sfnt_off00004089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4089 24316 bytes
SHA-256: 4af128229ecc373bf31a6091001f58a65936397d12f662c976da460ced806e73
font_01_sfnt_off00007825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7825 19776 bytes
SHA-256: 8b1ea65ea8ac55873c773f10397394051267d319abb013f94bb5dcd46562e829

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