Malicious PDF — malware analysis report

Static analysis result for SHA-256 12186d55e7875424…

MALICIOUS

PDF

69.0 KB Created: 2021-06-16 22:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c20d03dfccc3403cf94cef19bcf3c9a6 SHA-1: 6b28b866a9856db4deada8362b7ce9adecec175f SHA-256: 12186d55e7875424e0cb6060fc6a0b6e9aac4d677db88ed4fa0d02ee7183fb9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=introduction+to+aircraft+aeroelasticity+and+loads+pdf PDF link annotation
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb733791fdd---42821726741.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c04bafb7aaf51feb91222edbc855d211/pitelirifej.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e70e720395---23784538334.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9abc79c23d---69605276807.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608472a2e4aeb---pigogujotekuxirulox.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/sakabedeta.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16216144337516.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/9cijg5q7smk4t4r2cdinmlf173/83118574799.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16092d70b92415---rakemajogimubajumavogisex.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/aldiug3sf3ered4var1tad75j1/23134073491.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d81c423849d8d3a4bf5f3c8a9862a0f9/wozefidogukagonu.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b539f84ae374959143051f4db5067fe4/75448133469.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/72ecebc7fa4356e820522bb602af397f/wusijetovubakaruf.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/folowozusuxinawigu.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/wizakibusujepigazuxiraj.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/93778729634.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/a0a3aa0dd37d283f686b4a6e250845f2/52118258668.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7136a149f7636240f9687c6648d02ea2/26160167036.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/57c6fddac5ccc5d7e13360299970ca08/zigifadatukajogiwapuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 5188 bytes
SHA-256: 7ca7c841a7b8c0eb3104b010e0d21d9d3c4606fd9ef46c61c3833a684d6c8444
font_01_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 10572 bytes
SHA-256: 6523a185c026d6067a01c844c97c0bc0782b3ebf71492189ec004c468c5cb48f

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