Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56986ee55c135f2…

MALICIOUS

PDF

77.2 KB Created: 2021-09-11 10:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 28754d10b61fc2bdd81fc41a1800acbb SHA-1: 9db7da4d553feede3aa9a9a74a3e369ec7b7eb56 SHA-256: f56986ee55c135f27b4e4e600ea2d8b65a1af2c752c892bbf8ac2b4e0e4f61b0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, with numerous external URIs pointing to various domains, including those hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://catamma.ru/uplcv?utm_term=volo%27s+guide+to+monsters+races+pdf PDF link annotation
    • http://auxerretv.com/content/public/file/vuvexefaxukifi.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/28944964269.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386e88ee60f---60666586878.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/97114307956.pdfIn PDF document text
    • http://edituj.cz/res/file/kipemuribekibirosuto.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/25afea1715aef4613bf750f1ac04ae18/ratapugapaderusojifuwu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf79496e27---sogituwolap.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/jixamorolaratujuvafeduneg.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/20834721792.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/vonipu.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/vejexosidakajodesoroguna.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/mamopefewerefepup.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131b842dc5f1---wisaxebopef.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/zejubot.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/kofemaxuxurufune.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135b010253c8---wuwitoduxak.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613147d01f44b.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/61554585037.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/wokubakumukili.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c18276d2b6---jogiwaxefewafenaxupeguk.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/a54973195e2590820ab474f3ca5e48c0/89511083194.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1c08e8762---wizadotozafisanoweg.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/17730488415.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/16744231055.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6568291f147344a184caceb3d16fb894/pugigatofipupabugipovuxov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 11068 bytes
SHA-256: 0c76901ed8d71e8d5df84aceeba2bb0d5f377661b50b4a27758aa1df4ca9bc6b
font_01_sfnt_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 17424 bytes
SHA-256: 7c41f7765cc32af39eb46f870969f3828f805d9723c751a2c4e137c403f78a83

Open this report in the interactive analyzer, or submit your own file for analysis.