Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ffaf1d592da5f8…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 06:53:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 194e9478505506cc31433de8578de3b1 SHA-1: 68491234ebaec3bf4f025c46434384cf80efe302 SHA-256: 86ffaf1d592da5f85468e0db15672f7f638f056880144997d8ffe8a8ef33e370
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized slugs related to game hacks and free currency. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the embedded URLs and document structure suggest a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/gamesoffice.net-hack-coin-master-game-hack PDF link annotation
    • http://www.dcgsrl.it/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-hack-no-human-verification-2021_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_003_off00004a2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2F 25088 bytes
SHA-256: a3c83bffe7956bd675b328721e81c7936e6842b5686240610d508f205d2e7241
font_01_sfnt_off0000842a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842A 18044 bytes
SHA-256: 29769621f517b9af2b6051fd62e22acd3f15304c2918e063dab3d8ffe0b29dd9

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