Malicious PDF — malware analysis report

Static analysis result for SHA-256 08168550e28db0a0…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 06:34:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d1b46e23118a8f52fb558df1f16c6482 SHA-1: 13bd42c3993b0a5af7f6e453a203d954b7599781 SHA-256: 08168550e28db0a065fa6dff47da51d0da7945b6a24370120e45d7fa61cc1b46
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are structured as a link farm for game-related cheats and hacks. The document body, though partially corrupted, contains references to 'cheats for coin master' and includes URLs pointing to external PDF files. This suggests a malicious intent to direct users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/cheats-for-coin-master-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/pubg-uc-whatsapp-group_GM1330123889.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.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_off00005202.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5202 24640 bytes
SHA-256: 43f831ddfb4bb1e612baa49bad656ea5966d545d9d06a779bf23af79c0fe1d55
font_01_sfnt_off00008a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A30 17876 bytes
SHA-256: 503fe8d746beae52c5eef18798c5d93272f0ad11156ff4c57f17f4a0b53681c9

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