Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2275580921dc38…

MALICIOUS

PDF

89.2 KB Created: 2020-04-08 23:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f56c973a9b0d6c1024c90edbbd43540 SHA-1: 3f484399ddf9ac60651b148e98df240e0ec41baa SHA-256: 8b2275580921dc3801ab48595a780fa1700706794f97f024cf85472ecba5d86b
62 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links embedded within the document. The document body is heavily obfuscated, but the presence of numerous URLs suggests a malicious intent, possibly for SEO manipulation or to redirect users to malicious sites. 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://bwsinvestments.com/uploads/1/3/0/6/130605259/130605259.html#la+grotte+jean+anouilh
    • http://girlshackla.org/uploads/1/3/0/6/130620564/zeboxuwazodas.pdf
    • http://amandavoris.com/uploads/1/3/0/6/130639706/kanadinin.pdf
    • http://mthopeparanormal.com/uploads/1/3/0/8/130874613/3b4c2a7.pdf
    • http://admgems.com/uploads/1/3/1/4/131438187/773b7aa94ca4fe4.pdf
    • http://umsaxnomeucasamento.com/uploads/1/3/0/6/130620430/3357300.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_off0001273b.bin
7b708e62038c8df5c92defab7d32b72cca89bfabeba6eec439fd75ac610fb8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 11624 bytes
font_01_sfnt_off00014cd2.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD2 2652 bytes

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