Malicious PDF — malware analysis report

Static analysis result for SHA-256 681b50277fc767c7…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 18:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f722754efd85e3e45b28d593e46e0cd2 SHA-1: 39829ca5794fe58666079a056567cfbdf12cb1ca SHA-256: 681b50277fc767c749832e16858d20d9df10105f545a76790e79e99b79db0fc2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/431946152/how-to-get-free-robux-easy-no-download-game-hack PDF link annotation
    • https://financia-business-school.com/static/upload/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-lvl-hack-in-naruto-final-bond-in-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/hay-algun-hack-que-funcione-en-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-hack-tk_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/safe-free-robux-generstor_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-robux-hack-javascript_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/robux-boost_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/robux-hacks-that-acctualuy-work-for-everyone-on-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-vip-gamepass-free-script-hac_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_off00003099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3099 22656 bytes
SHA-256: ebf85f989918d45d055ef104c1b183a0f662464f94ddaa4de88151b14548890d
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 19580 bytes
SHA-256: cec9a933bfe218ed72e75e78f410bfe5e0ee423effe7607af1f96a02e11767e9

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