Malicious PDF — malware analysis report

Static analysis result for SHA-256 666a29d2a32d65ed…

MALICIOUS

PDF

137.8 KB Created: 2021-09-07 18:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a15f343db11712bd75726951d42614c6 SHA-1: b7a5a2b1a9501da7e3d232cae34700e7b83d3334 SHA-256: 666a29d2a32d65edcdd25b664e2a5aacc8fd6c2d1ae14e0c1951c6f222ab4895
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically related to phishing and link farming. The document contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://pixomot.ru/uplcv?utm_term=acoustic+and+auditory+phonetics+pdf PDF link annotation
    • http://a-kamen.com/userfiles/file/zovopi.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/53134df487d5c50ae0c74dfa0486637f/90276330446.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c031675f---fubiratumozasupevi.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/52081354965.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/cce290576dbd417154d24141d8546064/68947870756.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/sezokaxiwugiviburoburofi.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/sesagojakexisanaxipagadar.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080fbd5b0a95---24610003451.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/pibusiwego.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/vanozulutokosowejuwixonut.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/wutawugazuragife.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/18320536281.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/12807784009.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/dagoxamud.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/91556636448.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/nurutevuwazokulemofurekop.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/65450089015.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/48803233225.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b7190055---61528121676.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986c6bbfcdf---19200864780.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/db4t8f5hleib1v7fdlcleifhpk/12216377730.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f19e193da---fabubowiwanix.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/dugitipabaxo.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_off0001b184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B184 20928 bytes
SHA-256: 6e18d90d32a8d845676f25d5243840ef4816b34be77fa35b156780594024b31f
font_01_sfnt_off0001e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2005C 10868 bytes
SHA-256: 54849d425e058bfa9fba3afade04665454f7c4265475245051efd2ebf01b45a0

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