Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ee2aab41032da9…

MALICIOUS

PDF

77.7 KB Created: 2021-09-07 01:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02de9affc7b8375d6b4aa72872cf5fea SHA-1: 9be27d656683e0bbea219bce4e05df4bc3040e57 SHA-256: f9ee2aab41032da9cb67dca09e73856a4ad56d12340694faf56add78ee5e957f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage attack or a phishing campaign.

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 http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/35586092964.pdf In PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/214f7f6deb7ebb305a506368400391e8/dezowovanifowupug.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/0mfkouv5i6bp0avl8boqch3jv6/ratevomilumoko.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/timugosuzesoxewabol.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f58eb241545be75ba95cd3a3cc836718/xadud.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/vfdf3huesgds73tujrcofrprq7/sowatezosoxugudodip.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/72069501569.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/v2kctajkesn97eti5948igpql0/22324901966.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/84650382106.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d74b19ad8380691148b7cad713cc5270/85051510236.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/24a2ad69e204449b8d3349c9da93f670/gurerobezuxigex.pdfIn PDF document text
    • https://micsys.in/userfiles/file/joxadozoxutirituvejarug.pdfIn PDF document text
    • http://strandedtattoo.net/file/77183941745.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/23699386735.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e03e291b61---giwodamaxaralitutej.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbabc12a841---fezurupobopisimaxux.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/078e2ce39d861b36a932fc3d4ca3afc2/gabiretobuzomexor.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/6105683973.pdfIn PDF document text
    • https://wsbtitan.com/images/file/fabuzo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080c3492499d---56400182965.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/gi3nrr4fneot6mhla6f458jq0p/63679310908.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/81005343681.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/edd1a61ddcc859d8f430fd80ebd969e2/mupogowikizajojer.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/vamima.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bcfk000818fo8fr6gpta0r9ph0/wigulakewopowipomujuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=extraction+technologies+for+medicinal+and+aromatic+plants+pdfPDF link annotation
    • 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_off0000c9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 11152 bytes
SHA-256: a8cebd5100aee75dd1154f70e255bd47b7fd3e9ce06ed1c8fbfcff0f4a885930
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 16832 bytes
SHA-256: fce1930ea600b684a41064a9e1a56051a465e427396211800d1edf8c02de9171
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1