Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdf3d194bece44e…

MALICIOUS

PDF

227.1 KB Created: 2021-07-05 14:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d6485ca127e4a6ac5adb68d57d4035f5 SHA-1: 68a73400702a5a5112cafdea9263631b759ded6b SHA-256: dcdf3d194bece44ea4309d55ff6fe7dae83bbdc2a3c18edcce99d4848006e81b
250 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, presenting a fake CAPTCHA and a lure for a "Pokemon Go Free Kanto Tour Game Hack" to trick users into clicking a malicious link. This link, http://netcdn.tw/app/1094591345/pokemon-go-free-kanto-tour-game-hack, is associated with known malicious redirector infrastructure. The document's structure and content strongly suggest an attempt to deliver a secondary payload or lead the user to a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/1094591345/pokemon-go-free-kanto-tour-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/wheel-decide-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/rbxcity-free-robux-instant_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-run-lua-script-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bc-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-youtube-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/nitro-fun-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hack-chakra-naruto-final-bond-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-make-cheat-engine-on-roblox-not-crash_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-counter-for-roblox-apk_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_023_off0003210b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3210B 25576 bytes
SHA-256: 9a85ad71079bc32236ae2be84521c45fccd8c289c601b203c000abf93e65aad6
font_01_sfnt_off00035d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35D0C 18604 bytes
SHA-256: 0cea54e5528ccf61d05217632fc88ec0c91be6217172f30e53edf5c251fb55c5

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