Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb816136d9a5799…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 04:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c1d36f1d746ca10e79d537b359925142 SHA-1: 80e3ca5b8e6aa8afd62601f29d6ce13485e0d61d SHA-256: 9eb816136d9a5799b661369d46583c140c495aa8880eedb74ea80e37a92b0d9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'Coin Master Game Hacking' generator. The document body and numerous extracted URLs reinforce this lure, directing users towards potentially malicious websites. While no scripts were extracted, the embedded URL and the nature of the lure suggest an attempt to trick users into visiting a site that likely hosts further malicious content or exploits.

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/406889139/coin-master-game-hacking-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-accounts-logins-and-passwords-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-generater_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/fre-robux-today_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/ban-hack-roblox-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-de-roblox_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_off00003092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3092 22612 bytes
SHA-256: 1e7665ef72cd06fa2f4780256e600624b9e27e801ae96aaf6fed3efbfbc128a4
font_01_sfnt_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 18264 bytes
SHA-256: 2cce2bd7d0c34e42cbcfafb01eed0627e7eec2b35f394281c800f8d420957298

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