Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc27e0413dc17df…

MALICIOUS

PDF

34.1 KB Created: 2021-07-19 18:20:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: df67e6ef7e6f33aa1c968145c366a60c SHA-1: e631581e2e903c9d84db3b25f5836d47ca3d95a2 SHA-256: bdc27e0413dc17df35f223c80073bd2ac0eacaf4e386b2f857b517e22aa273d8
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 0.9955

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 http://netcdn.tw/app/431946152/free-robux-generator-com-roblox-hack-game-hack PDF link annotation
    • http://gazelletr.com/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 22392 bytes
SHA-256: e393cd63ebd571a47ad34c7ba30a911ead1a62b904244b1e5693c7785e3539f7
font_01_sfnt_off00006144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 19036 bytes
SHA-256: e9298e23474107c7b84722852f71881d4055e6a131595fcbba005770bedde36b

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