Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb0077313406584…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 03:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e34702257b4bbe5e922c16fdc8a73e57 SHA-1: d1c56ab549533cdd801e81821d7d35cfa091567f SHA-256: 9fb00773134065844b61f49a014baff39b4ef664ebd817865b0f89e67be7938a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into downloading potentially malicious files or visiting scam websites, as indicated by the 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The document body and extracted URLs reinforce this, pointing towards a phishing or scam campaign related to game cheats and currency. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/games-to-get-free-robux-game-hack In PDF document text
    • http://razredna-nastava.net/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/mobile4free24-com-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-uber-roblox-sound-id_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-roblox-admin-dl_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-adder_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/dev-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-ios-apk_GM406889139.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_off00003394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3394 22292 bytes
SHA-256: c1230c7c3a7e4f447fc8628b29f41bbbc0905848589661e33445295ba1a7836c
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 19080 bytes
SHA-256: 03ba3cd79afa517eed98ce6a768f8c6318a94a6bbf9eb4faa980b5a438220dad

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