Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba36c4f31d462ca…

MALICIOUS

PDF

36.6 KB Created: 2021-06-18 17:00:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f0fe9728b07bd1eb3a8963e5c5210483 SHA-1: ff9506023f1b2c0e9b5bd382476f6f8c38bf46ad SHA-256: 3ba36c4f31d462ca59f595ebdd1c4644bb6dbd7a23e8212646475ca5c28f3fd6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. The document body and extracted URLs suggest a lure for downloading applications related to game hacks and in-game currency, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-roblox-the-with-downloading-apps-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-building-hacks_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-infinite-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-followers-no-survey_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-para-roblox-de-romper-pardedes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/71-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-vip-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-redeem-code-genartor-no-survey_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/best-way-to-get-robux_GM431946152.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_002_off000033f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F6 23152 bytes
SHA-256: 6c0cb5b2ce15f394e8b43f96e170933b257bab98451e83a3912c48c69b366d94
font_01_sfnt_off00006818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 19740 bytes
SHA-256: 9361587551b4fce69c9a4fceec0e45ca3ef0794f005d73e7889c752bd59155d9

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