Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8cda33b7e9b918…

MALICIOUS

PDF

35.2 KB Created: 2021-07-02 09:07:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ff626b0c0190f947c6dd645bfcc5d34 SHA-1: 9bbbf4c40a261aee62efa53eabdadbbb50f3dba6 SHA-256: bc8cda33b7e9b9182c79c5b02a90b81ad59df78e250d4cd1c545eaad2630c88c
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/406889139/40-free-spins-coin-master-game-hack PDF link annotation
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://www.indovisionjogja.web.id/ckfinder/userfiles/files/how-to-get-a-lot-of-robux_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_off000034a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A8 22320 bytes
SHA-256: 527d5f5007468e75eb6e761591d750eff95a67f5a862e1474e65f9cbedafb4cc
font_01_sfnt_off00006666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 18408 bytes
SHA-256: ce82454962f5f3d8f32b8d714c7dfb82c9591ccd0919bf0a26c63f76146bf830

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