Malicious PDF — malware analysis report

Static analysis result for SHA-256 168e80f2f46930ea…

MALICIOUS

PDF

78.1 KB Created: 2021-06-20 05:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 64c621b34f9ee73f6117546f06708199 SHA-1: 13d5381d3b8b8260cae629afdc0d2b9616e16b03 SHA-256: 168e80f2f46930eaa256bd270031cb78a8c229645c49f77e9f9579185f008644
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS uploads, suggesting a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'faraday's second law of electrolysis', likely a lure to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6818

Heuristics 4

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/6fe7f2a1ab8216279071a8f3b3f68fd2/16311882870.pdf In PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609658f3f2aca---19648644743.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9a5e4b15---davevib.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gd4cpisg53g8vqptpf5vd3ecj3/lekijatufenamupapi.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/gorenadiguweselozipatowo.pdfIn PDF document text
    • http://ozari-ua.com/files/file/81541398790.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cd87d398d---fabovivikitumobi.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf562215bc---60782226162.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a436cd0373---94364532200.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/3b7004cc144a97d5d0dfce148ee61ebc/xowef.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/dbd3050e2dd243bd9e3b9fa3b8921c2c/67779931021.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/2pn7ua6eu7k07tqsd2nddahi4u/tifowowufivolikokix.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3099b7e90b---53958693596.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160badb801472d---85428221369.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/mujexomowuvazaxexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=state+and+explain+faraday%2527s+second+law+of+electrolysisPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 5336 bytes
SHA-256: 6c348784eaa01bd3cbc55e6e9215c87674418944a05b09ff57bff8cf724c2165
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 12312 bytes
SHA-256: 0a752f8f8e1c389c118a499c6b657458b7d95cbf1d4fbe2dc921677e7e72327e

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