Malicious PDF — malware analysis report

Static analysis result for SHA-256 577e82c3e9cd60c9…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 00:26:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1e5d155653b4220054ffc81b4eba58db SHA-1: b93c12d5cfbcbaec13f85d43094fd93e7fa84754 SHA-256: 577e82c3e9cd60c9cf3003086e833f21c235d4f89dcb71bde2fa21ed9b34100e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising game hacks and free currency. The document body and heuristics indicate a lure designed to entice users to click on these links, which likely serve as a delivery mechanism for further malicious content. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/how-to-hack-someones-roblox-account-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-shirt-templates-on-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/collect-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/como-hackear-roblox-en-pc-para-tener-ventajas_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-without-human-v-dr_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-lumber-tycoon-2-money-hack-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/is-free-robux-real_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
font_00_sfnt_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 21872 bytes
SHA-256: daebe15321785d28222be671410879cbf44ea173e582073338e9824483fd17b3
font_01_sfnt_off00006116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6116 19324 bytes
SHA-256: 64c0d96001d8dfb5bf7499830987bf6c9de47f878144bc2b65d78747ca645951

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