Malicious PDF — malware analysis report

Static analysis result for SHA-256 334cf2f9ba59320c…

MALICIOUS

PDF

45.7 KB Created: 2021-06-04 01:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 819cb232cdf2903381741c787f75ad8d SHA-1: 1868c1f457f89fe2faa608c6ce4322db63e6a27e SHA-256: 334cf2f9ba59320cef8cfde99fbf9a1c3ab8aabb7e01ae951d202ae9e84f4456
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a deceptive call-to-action related to free game spins, which is a common lure for phishing or malware distribution. The presence of numerous external links, including a link farm, and a high ML classifier score indicate malicious intent. The document body, though partially corrupted, contains a URL that likely leads to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/406889139/link-for-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-survival-server_GM479516143.pdfIn 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
stream_004_off0000557b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x557B 26640 bytes
SHA-256: 8b3b54f9872604ffb482784ba157936136964e4c3c9f75fcfb11375ca2ad6a0a
font_01_sfnt_off0000911c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911C 18056 bytes
SHA-256: 722d781e478cd0d1a4785e673d05427d87221dd2f44d1d4595ffa323240eece4

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