Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf59834179b86b2…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 11:40:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aec1d9e886081723601f0a50c4bd729d SHA-1: 6aa3c839f2543f764844b6201f2c3b5cece05ef4 SHA-256: 7bf59834179b86b2c21c5b44ff9bb48bc7cc315193ca473df4355e63af982419
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to external sites with game-related lures like 'coin-master-reward-link-game-hack'. The ML_NYX_PDF_MALICIOUS heuristic also flagged this document with high confidence. While no scripts were explicitly extracted, the presence of embedded URIs and the document's structure suggest it's designed to redirect users to potentially malicious content, likely as part of a phishing or scam campaign.

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/coin-master-reward-link-game-hack
    • http://library.apsidoarjo.ac.id//repository/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-gift-cards_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-event-hack_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://library.apsidoarjo.ac.id//repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdf
    • http://library.apsidoarjo.ac.id//repository/roblox-piano-hack_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/hack-spin-coin-master_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/youtube-roblox-broken-bones-cheat_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id//repository/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-2021_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-facebook_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/download-hack-coin-master-apk_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/pokemon-go-free-to-play_GM1094591345.pdf
    • http://library.apsidoarjo.ac.id//repository/hack-coin-master-apk-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000534d.bin
5c981ff7c2cf7f48299e046a0cca811082cd6e440f628c2b5e984bb8d45bbde7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x534D 25368 bytes
font_01_sfnt_off00008d04.bin
c2793d17727503817a30064ba8beed92adc1bd6ab198ac538296771cbb61b552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D04 18056 bytes

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