Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bd133cd2afb29d…

MALICIOUS

PDF

227.2 KB Created: 2021-07-05 14:30:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cc44c618fe5ed3c3e4abe17a35f9d141 SHA-1: 4a7bffca6dd70177a5d349be0ed9805110fba2c1 SHA-256: e5bd133cd2afb29de9cd361736e56adc1797846c8313aa85c2d114c8cf99d43c
250 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising a 'Pokemon Go Free 7 Day Streak Game Hack'. This lure, combined with heuristics indicating a fake CAPTCHA and a download button, suggests a social engineering attack. The primary goal appears to be redirecting users to malicious infrastructure to facilitate malware downloads or phishing.

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-7-day-streak-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/february-2021-robux-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-free-minecraft-hacked-client_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_off00032057.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32057 25576 bytes
SHA-256: f12a4ef5e7904f7b071ea6371812ace1b080366b1cd381d109f12d4ee6ac8812
font_01_sfnt_off00035c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C58 18868 bytes
SHA-256: d4d1f52fe6a39c78838f1974ae4d05cbd5939f1c8a22a6cb3549bc608c23bed7

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