Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e2b7140853b86b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-22 06:58:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6dcf3de20a964a6d0bebda60b95b8a55 SHA-1: 2c1bc45fcc6040b10d3c7390b1f7491e010e28ec SHA-256: d9e2b7140853b86b83ded84646b40f897505c1c3d514756dbd7eaa1c7c204926
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users into clicking on a 'Coin Master Hack' or 'free robux' generator. These links redirect to malicious infrastructure, likely to download further malware or engage in phishing. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links for a game hack lure.

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.co/app/406889139/coin-master-hack-apk-download-2021-game-hack In PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-sign_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A6 22460 bytes
SHA-256: 52e57018a4902c2fb5765512816b7446ae1da38dcc79759b430b64a0800104b2
font_01_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 19160 bytes
SHA-256: 74154339b294d6feca0152a4072c83326c1fc7d9ddb702fdec28eb90277bbd47

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