Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a6fd51f36b5a03…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 16:47:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6b590f82e3b212ed6c4a3f6466dfcd7c SHA-1: 5cfe53827e1551da7e25247ad486d0e828a7b0b7 SHA-256: 44a6fd51f36b5a038febcea52beb5296c0b5bbf4dff2e59fcd8cf038d0ae184c
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/roblox-free-robux-clothes-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-roblox-gift-cards-not-used_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-games-free-online-for-kids_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_off00002faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAF 22212 bytes
SHA-256: b4f2adead14aa4ff75ed2302aaafdb68c5bfae2d12c3ddb0b916f83db505fde2
font_01_sfnt_off000060e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E6 19060 bytes
SHA-256: db8619a57009a1cd99845aa0d19788a9ab033d801353adf9f7e7b0ca8645fa9b

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