Malicious PDF — malware analysis report

Static analysis result for SHA-256 330ae02c54f31c38…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 14:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a5841faecaf7b2ac211fa3c6cdb45d91 SHA-1: 8c0e642198861900c2b9314f5b8fa1e34bd8d7b7 SHA-256: 330ae02c54f31c387f74a1141c24d93efc47268ed21dcf48ccdb888fe942648f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites offering 'free' game resources. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The document body and extracted URLs suggest a lure for users seeking in-game advantages, which is a common tactic for phishing or malware distribution.

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/coin-master-free-link-today-game-hack PDF link annotation
    • https://www.acacss.com/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://www.acacss.com/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://www.acacss.com/images/easy-robux_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/free-coin-master-spins-daily_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_off0000499b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499B 26236 bytes
SHA-256: a481d772771069fa4fa73c36ace0779066323949c99a116097ebadc6af543ffc
font_01_sfnt_off00008612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8612 18232 bytes
SHA-256: ac7637c34b6ea6a17139aeea995219f6842183aaecfc204fce9d36f337c74847

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