Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e199ef9cb81d8a…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 05:18:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b063811c176ee3efc7ad55fb7e301f0d SHA-1: 490a854d6e4844483a13e4ed60f5853de0d3d831 SHA-256: 64e199ef9cb81d8ab0eb891195cdf4d6ff84ddb4c0fa516c9c6c5f8d756e3602
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack' for Roblox. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious websites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of malicious redirector links and the lure indicate a high likelihood of a phishing or scam campaign.

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/when-will-roblox-liberty-county-be-free-game-hack In PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-skin-roblox-men_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-european_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/hack-roblox-2021-jailbreak_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-roblox-studio-command_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-roblox-stuff-blue-hood_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-money-boku-no-hero-roblox-remastered_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-roblox-http-catchsatoshi-online-robux-roblox_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/robux-app-hack_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003084.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3084 22980 bytes
SHA-256: d347bfa893c79eef0d718c294bdd017aa92e34fbbda365a2fb76ce8c15ccf0fe
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 19560 bytes
SHA-256: b4e3834fec2ec10993b1d2628c5825aa0b1e6154b95a37952e47558b25345e58

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