Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe787c5815cb518…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 22:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 820e79af18bccf496bd9d77303b529c6 SHA-1: 9f80f1b10957501ed40db698faca8cdc4ddf5aba SHA-256: 7fe787c5815cb5181b7a6ea897e18c07126d593d4dd0ef477f84d2fd7cfc36ab
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/free-pet-snacks-coin-master-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/ultimate-driving-delancy-gorge-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-cards-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.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_off00003342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 23436 bytes
SHA-256: 8724103984cc61d7d2016904aa1ebddaafdb2bda11efae1d3e3c4eb7aac6423b
font_01_sfnt_off00006850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 18320 bytes
SHA-256: 0e857b887b57b449fb703f00816ed5f053300a0f83deba051c228f68feb6ecb8

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