Malicious PDF — malware analysis report

Static analysis result for SHA-256 28228a6d56223750…

MALICIOUS

PDF

33.3 KB Created: 2021-06-30 04:44:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b326c048786cb95dd9993c9ddb672218 SHA-1: 13e79c474385a4e3173448c523a30a8c11811f78 SHA-256: 28228a6d5622375043dc95100e67dec1ffc85130f2dad842980501dc675beb19
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 0.9980

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.co/app/431946152/hack-robux-infinitos-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacking-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-aesthetic-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-stuff-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-id-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-death-zone-glitch_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/pubg-uc-key_GM1330123889.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/insane-admin-hack-script-roblox-pastebin_GM431946152.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_off00002c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C14 22156 bytes
SHA-256: d6dd1c5f902e310bedf201deb8a2676f2fd56854e13400bc2e253484b5eb867d
font_01_sfnt_off00005d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 18948 bytes
SHA-256: 6921e1a9d30ef6be06a898c2130634f82c24ae1d3514c25412cabd8ef3ce2d86

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