Malicious PDF — malware analysis report

Static analysis result for SHA-256 6598ea0d2aebaf5f…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 13:09:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bb90604cb1b0948806b004221f8e0498 SHA-1: 72e5f75681f42170649cedf6885216ba74eb35a4 SHA-256: 6598ea0d2aebaf5fff95736afe7b4be9518cf87e66cb4ea323d2b35e93182691
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 0.9621

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/free-robux-pins-game-hack PDF link annotation
    • http://gazelletr.com/userfiles/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn 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
font_00_sfnt_off00004835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4835 25612 bytes
SHA-256: c40e11167cbeddd75f10ac0b79f36ba1aa91568f93d103d5dd405c4ade1bf204
font_01_sfnt_off0000840d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00008dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCE 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c

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