Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf8bf221d75e7f3…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 10:13:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 27feb471e91c3d4a89e5e48fbdb3813e SHA-1: ab9ccbff62c7f5c24c16f61f7f7ed86a37e946ed SHA-256: baf8bf221d75e7f3c9178042087f09e6cf5133686a15c4f63d04fc510ecda6fc
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.tw/app/406889139/how-to-hack-coin-master-spin-ios-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/counter-blox-roblox-offensive-wall-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/game-explorer-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-items-2021-codes_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/rosenberg-roblox-hack-pain-access_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-intro-maker_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-exploit-scripts_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_off00003390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3390 23032 bytes
SHA-256: fa09fa4d2b724e05b268456a1730d0b8e0ad1f5661521aa279fd64aed66da3dc
font_01_sfnt_off0000673e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 18344 bytes
SHA-256: 26c495ddad6d19752d7b7d64abb9194f782c68fd49d6baac122766a6904e49cd

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