Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc74358ebe76aa4…

MALICIOUS

PDF

47.2 KB Created: 2021-06-11 08:34:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b9f78741cef124c3dfd5d2ff5473c485 SHA-1: 408380a531d23ba1d37a3a9aeaa7d75df9cd09cb SHA-256: 3cc74358ebe76aa48d0fd791a86f86cfaad2856cf0256ffcb74466b91031b68b
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 0.9769

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 https://netcdn.tw/app/431946152/how-to-create-a-roblox-hack-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/gaming-cheats-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-a_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/redeem-roblox-virtual-item-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-download-for-android-tablet_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-your-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-card-reedemm-code_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-in-meep-city-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5025 24532 bytes
SHA-256: 5ef9dd6f3a72941e7783c9ed5b495a76fbb2fcd4d94d7b6b0a2a7021c2575d30
font_01_sfnt_off00008865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8865 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000950d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950D 18452 bytes
SHA-256: b5e24a8b63aef52dca624eafe6becb8308b7ef02ccce8967136d8234f9ea7608

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