Malicious PDF — malware analysis report

Static analysis result for SHA-256 823d1247823846b6…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 11:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c4233f126a0c5b89ddb7e5bd38083917 SHA-1: b9f148eace534b0262a0249ac6da29be5bc6fa07 SHA-256: 823d1247823846b6d9a41cd654ae6358e7f9be0b21c7228b3093325fa1523dd1
100 Risk Score

Malware Insights

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

This PDF document contains embedded links that point to known malicious redirector infrastructure, specifically designed to lure users into downloading applications. The document body and extracted URLs suggest a scam related to 'free Robux' or game cheats. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/gain.bux-gain-free-robux-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-using-codes_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-video-cracked_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-account-genrator_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/block-best-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-auto-rob-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/simplysarc_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3265 22260 bytes
SHA-256: 04b8d2191e4ee21ac1276ec4c338e9af67f393b91235ea2d59ff934e6ae043c8
font_01_sfnt_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 18904 bytes
SHA-256: c17ddf7cff581326edfd233d845e8e21a0f8f7ac918f63401a72904ac74374f9

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