Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f048255d240c26…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 04:19:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 09cd18b99d513e9fa007bb533c6f3a0b SHA-1: 1aa3514af011d2aed6c2bf655a2e0fad01a52a6e SHA-256: 85f048255d240c2697ddb1c7712e6846d4fbba451e9e20bf30fbe8755cca6e5a
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 0.9865

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.tw/app/431946152/free-robux-and-tix-cheat-game-hack PDF link annotation
    • http://www.fluidtech.hu/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-exploit-hack-november-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/2021-hacker-face-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/instalar-hacks-para-counter-blox-roblox-offensive_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
stream_004_off00004eb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB7 26324 bytes
SHA-256: 6330beafb4e64c2e2e28cf4954c96d0729ffa217e840b418ea0760219d5f8fe6
font_01_sfnt_off00008c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 18808 bytes
SHA-256: 29936fffe506abf292974d2d600627714b0ff83fd503e98e647ecaced17c49d0

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