Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83cf28912e17102…

MALICIOUS

PDF

77.3 KB Created: 2020-05-16 20:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e4f904d8a3405130c17ac02f19ec2a SHA-1: ee9d5a211e501c055cada7203cfc1f394f293cfd SHA-256: b83cf28912e171022d04f5de2696b3a87f3f5bcfef82a65b08c16838b4f05a6d
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains text related to 'Infective endocarditis guideline 2017', likely a lure to encourage users to click the embedded malicious URLs. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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://davidmarquesibanez.com/uploads/1/3/1/4/131406453/131406453.html#infective+endocarditis+guideline+2017+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
    • http://theministrynet.org/uploads/1/3/0/6/130621250/3792811.pdf
    • http://twinelectronicz.com/uploads/1/3/1/1/131163691/2749613.pdf
    • http://prime-autocare.com/uploads/1/3/1/3/131380299/8003401.pdf
    • http://southerncrosfloorsanding.com/uploads/1/3/0/7/130739202/gafumapokesibaxir.pdf
    • http://gossipdiva.com/uploads/1/3/0/9/130969603/8810350.pdf
    • http://mrspecialties.net/uploads/1/3/1/6/131636826/tiwibigigixuzaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d898.bin
4060aad58df4a23860ebe1087327f51216b70bdb397e47636c4b0d00de342586		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 6172 bytes
font_01_sfnt_off0000e89b.bin
0349558983125cedc52c33b3cfcbb9482e88d5ccaf0eb0b89bae03e5fc8d2749		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 12440 bytes
font_02_sfnt_off000111b9.bin
e0777f6a1bd995d4c9df845dda5573f86e03ad3e6a71cbf9cbbf6e8544b72fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 16188 bytes

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