Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3d54864f36574e…

MALICIOUS

PDF

44.0 KB Created: 2020-04-21 20:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 801d58ee9cb148c5c978319c1f1ae10f SHA-1: 53c580cfe8095a81a70b57c5d387ffbd2490fc8c SHA-256: 8e3d54864f36574eb99cb73062a12407bb05d755d7ed5ab74b1607321263d0c8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic indicating it is part of a link farm designed to host malicious content, with multiple external URLs pointing to PDF files. One of these URLs, 'http://momwifeandceo.com/uploads/1/3/1/6/131637041/131637041.html#update+software+android+7.+0', is embedded in the document body and suggests a lure related to updating Android software. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the document may instruct the user to open a password-protected archive, a common tactic to bypass gateway security. No scripts were extracted from this sample.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://momwifeandceo.com/uploads/1/3/1/6/131637041/131637041.html#update+software+android+7.+0
    • http://crossdaborderz.de/uploads/1/3/1/4/131410399/fakokezelitobuneloje.pdf
    • http://superior-electrical-services.com/uploads/1/3/0/8/130873953/kegexu.pdf
    • http://firstbostonconsultingcorp.com/uploads/1/3/0/7/130739343/70451a22.pdf
    • http://ramsaydesigns.co/uploads/1/3/0/8/130874570/69f1dc63c3.pdf
    • http://mcaroadsidedeals.com/uploads/1/3/1/3/131379029/nelurobi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079fa.bin
ed9b1cccc0f83b1fdbb8f212c9a0b1a5b14997e49f2fc802bca7b05fee03ab7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 8744 bytes
font_01_sfnt_off00009b5c.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5C 2652 bytes

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