Malicious PDF — malware analysis report

Static analysis result for SHA-256 75656a423fbdf8e4…

MALICIOUS

PDF

227.4 KB Created: 2021-07-05 18:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5ca195df652af6d273759c33c21c315d SHA-1: 89a29360184ced978c407d0e8f61da6056a49963 SHA-256: 75656a423fbdf8e439d04d9aad0b8aab7864527279d2527bfdc79cfe4631b1c8
250 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs social engineering tactics by presenting a fake CAPTCHA and a lure for game hacks to trick users into clicking malicious links. The embedded URL, http://netcdn.tw/app/1094591345/pokemon-go-free-team-change-game-hack, is identified as a malicious redirector, likely leading to further stages of infection or credential harvesting. The document's structure and content strongly suggest it's a phishing or malware delivery mechanism.

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-team-change-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-roblox-mad_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-on-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-dragon-ball-rage-hack-stats-new-method_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-and-catalog_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-when-will-world-zero-release-for-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/jailbreak-free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-prison-life-roblox-2021-pc-dansploit_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hotshotgamers-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-overseer-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/gears-online-rpg-roblox-hack_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_off000322ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322AC 25576 bytes
SHA-256: 5579c5b3303293a1268628903899f7a81fd166d8799030483768790a351e91d1
font_01_sfnt_off00035eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EB8 18524 bytes
SHA-256: 21c15a36416f8869b7426fe859882fec22186730d02a34de598674690aafd2d0

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