Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2d231a16daa764…

MALICIOUS

PDF

46.0 KB Created: 2021-05-13 00:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 27b5492e88e5dff198d0d06b1739f3a7 SHA-1: c6b5c80c6b44331c0704f103ee7bd6689c496162 SHA-256: ef2d231a16daa764f57a6d20a168fa864513694fdaaf86fbda5d41d851e90e21
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 https://netcdn.xyz/app/406889139/coin-master-link-daily-get-free-spins-and-coins-game-hack PDF link annotation
    • http://librarystkippgribl.com/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A73 25172 bytes
SHA-256: d30e78d137150e9a6304f5bee2daac7c9bdab46e4da151c2f52af81a6f45dd90
font_01_sfnt_off000084ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CA 3460 bytes
SHA-256: 27f6ee24b80a0c45a340e32027a43d6c3a7853aac96563eed14d58819399f6a8
font_02_sfnt_off00009034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9034 18652 bytes
SHA-256: 0bf586afe4d5f3c7a2e6d5ddfec06764aa84fbd58834f3b0eff460c3a87010f1

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