Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a559fe2da5ba36…

MALICIOUS

PDF

33.5 KB Created: 2021-06-18 01:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bdf7e8154bed4b6184eae0834c5b6d3e SHA-1: d5909c5d7e18db9c413a22707f932c874b2efa32 SHA-256: 96a559fe2da5ba3659f42c7938156954fd0365e804d2d5c846e8efe898503dad
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/get-free-robux-pastebin-game-hack PDF link annotation
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/paid-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/can-i-get-free-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/cone-master_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_off0000303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303F 21212 bytes
SHA-256: 159e0b42311ebe7b39cf25e727443f22188f7dffe2d0026b7c3a251d36c3e739
font_01_sfnt_off00005e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1F 18908 bytes
SHA-256: 6c798e254b7400d23b7203a8bf6edac5ee69cfe0c2cbf68e87d5c1401b069e60

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