Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c71066ad7fa4473…

MALICIOUS

PDF

41.6 KB Created: 2021-05-10 16:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bb4d60097bb9a56becd9ed8acf653c2b SHA-1: f85f2065a53612fec2a1afd1bfd198d91c39eea4 SHA-256: 8c71066ad7fa44731da32b94438d2eacc2df7f03787fa5b74626a151c5b192b9
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 0.9971

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/mathep-game-hack PDF link annotation
    • https://www.zagorjeadventureteam.hr/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/weird-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/minecraft-creative-mode-free_GM479516143.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_003_off00004819.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4819 25636 bytes
SHA-256: 024160fa2dbe110017dd4755a7692e9d8a65bbea8c537feac08a5854f5488aeb
font_01_sfnt_off000080cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 18068 bytes
SHA-256: 2b3a9c081553d581a827df65dee23cc3b514f38b63125b20306762026e644864

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