Malicious PDF — malware analysis report

Static analysis result for SHA-256 b646e2516564780f…

MALICIOUS

PDF

37.3 KB Created: 2021-06-29 16:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3808b8cf108eb2de4ef9a6704780de2a SHA-1: be611741b53206efb2466f419f7761dc95770ecd SHA-256: b646e2516564780f09382cae83f60da029441f62f38496aed474cb12d60a3dc4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, likely intended to direct users to malicious content or phishing pages. The document body and extracted URLs suggest a lure related to game hacks (Roblox, Coin Master), aiming to trick users into clicking through to download or access fraudulent content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-games-for-free-for-you-to-play-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/roblox-how-to-get-more-fps-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-to-bypass-roblox-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cheat-roblox-avoir-de-largent_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-a-free-model-makes-me-teleport-to-another-game_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/brother-cheating-on-his-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-jailbreak-hack-how-to-through-walls-hack-new-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-and-tix-hack-no-download_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-everything-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-de-robux-2021-android-fast_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coins-coin-master-blog_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
font_00_sfnt_off00003805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3805 22876 bytes
SHA-256: 183fe199a37a89e11deefd2ec532de66ffc38bf29029f8e3a19d54d109b57902
font_01_sfnt_off00006b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B87 19544 bytes
SHA-256: 155a7883f93c47d044cca3f0e5628d9ea53c77a214d73c5522a0e6c3f375be73

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