Malicious PDF — malware analysis report

Static analysis result for SHA-256 5341c71099962858…

MALICIOUS

PDF

47.1 KB Created: 2020-04-24 15:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a53c7f126fbae5bc2eab141442d43fe9 SHA-1: fe49a2eabfc354bc061723f42485632cb3e43165 SHA-256: 5341c71099962858a4e3ea9ce59e08b35ec60ecf93313c13d17a3136c6dfbe7b
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm. The document body, though heavily obfuscated, contains a URL that points to a potentially malicious HTML file. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this PDF is designed to manipulate search engine results or redirect users to malicious sites. No scripts were extracted from this sample.

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://kalajarvenlomakyla.fi/uploads/1/3/0/2/130272554/130272554.html#mind+expanding+meme+template
    • http://sugarcraftcreations.net/uploads/1/3/0/6/130639861/90133ea0685.pdf
    • http://www.new.camarillochamber.org/uploads/1/3/0/7/130775730/logidinejutedazoke.pdf
    • http://southern-charm-yoga.com/uploads/1/3/1/4/131454549/993277.pdf
    • http://uvusouthwestseminar2019.com/uploads/1/3/1/3/131398244/tekapuxi-vagap-duzofukitonir.pdf
    • http://youareloved.app/uploads/1/3/1/4/131452967/85a803b5f.pdf
    • http://onlinebpi.net/uploads/1/3/1/1/131163917/97bb2.pdf
    • http://bornforbooks.com/uploads/1/3/0/5/130550764/11b4a578f0b08.pdf
    • http://myr2consulting.ca/uploads/1/3/1/4/131453252/863b96ef9.pdf
    • http://zoeysheart.com/uploads/1/3/0/6/130603958/gavenomolamawusewe.pdf
    • http://leahhartner.com/uploads/1/3/0/5/130588849/rewoxutos.pdf
    • http://hopfirecandles.com/uploads/1/3/0/2/130287445/8d37c8d73.pdf
    • http://simplyyogavancouver.com/uploads/1/3/0/7/130775001/49243e.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_off000077ed.bin
4b2d8ac906d32d9194b64e631711735ff5c906658a105becac19cdc03375d20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 9380 bytes
font_01_sfnt_off00009b56.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B56 16036 bytes

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