Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c466edacc92af4…

MALICIOUS

PDF

226.6 KB Created: 2021-07-06 14:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d97fdd5fa1385dc9f347ce46b8a24671 SHA-1: 53a38717a4b12fd959d9d14f833d6217ca8e74a2 SHA-256: b2c466edacc92af4ed9e596b7c5e226de8694f2b50e092de5f526144c661d8de
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains multiple lures, including a fake CAPTCHA and game hack promises, designed to trick the user into clicking malicious links. The document body and heuristics indicate a social engineering attempt to redirect users to external sites, likely for further exploitation or malware delivery. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 8

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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
  • 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 http://netcdn.tw/app/1094591345/get-coins-pokemon-go-free-game-hack PDF link annotation
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-pets-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-cheats-club_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/google-how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-items-roblox-meepcity_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-a-account-on-roblox-2021-no-logout_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/robux-cheat-engine-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/elysian-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-minecraft_GM479516143.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_off00031f3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F3F 25576 bytes
SHA-256: c7cce7293aed89e22ea1150432d4dc3e7a3fbd945dce23f26a9149d43233f9c9
font_01_sfnt_off00035b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B42 18584 bytes
SHA-256: 498954d491c8b5aeba85936c1c332e027aec664b0d00ac1249016aab3c6dbe47

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