Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbb5bc81b6ea7b1…

MALICIOUS

PDF

34.7 KB Created: 2020-06-15 01:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 045113107d24556e5d6a53180d410e3a SHA-1: 03a10c2a4083041239eb15c7c642d88040499ec5 SHA-256: 8bbb5bc81b6ea7b16cc118ccecb96882c4aee972e921adae6b0ea1415c965962
92 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, many of which point to other PDFs hosted on similar domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm. The document body, though heavily obfuscated, contains URLs that are also present in the heuristics and extracted URLs. This suggests the primary function of this PDF is to act as a gateway to a network of malicious or compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://craniosacralnashville.com/uploads/1/3/0/5/130547116/130547116.html#ankle+tube+exercises
    • http://integratedapproachhealing.com/uploads/1/3/1/8/131872082/3966906.pdf
    • http://fivestarfoodsfj.com/uploads/1/3/0/6/130621361/3409760.pdf
    • http://dwandcompany.net/uploads/1/3/1/4/131409861/bb85996.pdf
    • http://chakraconsult.nl/uploads/1/3/0/6/130604759/zerezifituvagi.pdf
    • http://ohio-dogbite.com/uploads/1/3/1/4/131455734/virexad-fusexo-ximusinu-kilodujur.pdf
    • http://lovinglaundryforhorses.com/uploads/1/3/0/6/130621115/9a4e6d3bf04f.pdf
    • http://tcsonline.net/uploads/1/3/0/5/130589100/3101496.pdf
    • http://mx.leafycharms.ca/uploads/1/3/0/8/130814611/delufed.pdf
    • http://williamsburgbotanicalsllc.com/uploads/1/3/1/4/131438579/lusasuwatubawox_sedosibo.pdf
    • https://ridarenujo.files.wordp
    • https://xemefijufada607084458.files.wordpress.com/2020/06/fujopudubizop.pdf
    • https://vufimadur.files.wordpress.com/2020/06/19751489410.pdf
    • https://zokozebinavi.files.wordpress.com/2020/06/vurejiwefepesuwezutoteduf.pdf
    • https://guvemajik.files.wordpress.com/2020/06/49220043832.pdf
    • https://ridarenujo.files.wordpress.com/2020/06/ruwifi.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cc7.bin
33c8c89c58fe7df047a298ef9f6ee5f12a48272a7a686215db43be38d47bc196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 10136 bytes

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