Malicious PDF — malware analysis report

Static analysis result for SHA-256 548ac61b9ecb6fa1…

MALICIOUS

PDF

36.5 KB Created: 2021-06-26 07:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1fa3eef211a5f9049a0e2327937fa4e0 SHA-1: 28d610e891cfacf6912ccbba5726f93bf5dec3ba SHA-256: 548ac61b9ecb6fa1436770ae3c45409e0c7b2b5ad45e510783a489dd4d95950e
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/how-to-hack-roblox-games-with-cheat-engine-game-hack PDF link annotation
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-two-factor-authentication-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-anti-speed-hack-fe_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/games-that-actually-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-para-trials-simon-says-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-cheat-engine-duplicate-assassin_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-first-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-find-free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-hair-roblox-not-a-model_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-com-free4mobile24-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-roblox-rom_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-booga-booga-roblox-gratuit-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-god-mode-hack-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-just-username_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/autofarm-hack-roblox-pjj_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-full-slot-script-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-35-000-robux_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-into-other-accounts-on-roblox_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_off00003422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3422 23192 bytes
SHA-256: d9d50b4df0c06f8f6638774f541aaf41a29a759e016014f20cc3c160effdaa3e
font_01_sfnt_off00006819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 19668 bytes
SHA-256: 6822c54fe2fc1c2c9fbd8a9d3ef9d55d8dadf11bee9bb45cc7008457905ff53e

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