Malicious PDF — malware analysis report

Static analysis result for SHA-256 2186d30a363f6bdf…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 12:56:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8bf213cfe645f429cf420aef0d3425e2 SHA-1: c5d822ec0ff31f2e78c431fabb1873bfbb501f30 SHA-256: 2186d30a363f6bdf01d5cbb3831bab3f775615aebb0f36ac1025b851053a70fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL, https://netcdn.online/app/431946152/how-to-get-free-clothes-in-the-catalog-on-roblox-game-hack, likely leads to a malicious payload download. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/how-to-get-free-clothes-in-the-catalog-on-roblox-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-glitch_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
stream_004_off000052f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F0 30880 bytes
SHA-256: dfa0cfee5b99056db96270832afbf8cf861a0bf04691a8a57acd9f6d7f7bee17
font_01_sfnt_off00009744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9744 18900 bytes
SHA-256: 14541b96b9c580508f23ef5fa3a50af31578334fcb6614530d1bd134a1a66a8d

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