Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa47cadf0f6e48e9…

MALICIOUS

PDF

49.4 KB Created: 2021-06-11 06:56:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ebcf216852c48242f2695a33c36b4dc7 SHA-1: d097a7674e2e0b68ac6ca356432556e45c387a4f SHA-256: fa47cadf0f6e48e93f6ecdf9d19d2e8b1c7383b364bd121c75d91f66420bbc54
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9796

Heuristics 5

  • 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.
  • 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.tw/app/431946152/roblox-robux-and-tix-hack-rtm-tool-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-jailbreak-hack-exploit-money_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-crash-checked-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/best-roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.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_off000055bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55BF 27064 bytes
SHA-256: 496638180773776e6c3126acdd0e968358eedaec9df7cfd8b6491c8bc6399dbd
font_01_sfnt_off000092a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A9 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C57 18980 bytes
SHA-256: d284803e222c7d0c915a3770551e70b4d3dfa4b4d86c62e8562c442ca27ab0a6

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