Malicious PDF — malware analysis report

Static analysis result for SHA-256 127cabb43fc56432…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 18:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7bc15f44062f82e7f7558f95b6bcf1b9 SHA-1: 3646540118b6d8974449df6ec9cf21c46d66751c SHA-256: 127cabb43fc56432cabb57f657ae72a49e2acaed8eaadffb46c226663ee4fd18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free in-game items, indicative of a phishing or scam campaign. The embedded URLs are designed to lead users to potentially malicious content or further phishing pages. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

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/431946152/buy-robux-for-free-2021-game-hack In PDF document text
    • https://7gking.tw/upload/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/cheat-roblox-logiciel_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-cars-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-online-games-for-pc-similar-to-roblox-no-download_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/www-roblox-com-play-free-online_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3232 22052 bytes
SHA-256: 6c95573d24aeeedcd03cd4a489c70e86fac4e9b83ae59a17e0dc06ff57a41cd0
font_01_sfnt_off000062e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 19300 bytes
SHA-256: e03a46fba3515dab0dcf470c7e6035e5ea44668780ca69c8145871e6cd04bffa

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