Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6164912f662d12…

MALICIOUS

PDF

91.0 KB Created: 2021-06-30 23:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2997e7f1f4299ee83e52a387a909602d SHA-1: 83d76fc50b9c2e58429e625bf248ec0b85dce47f SHA-256: 3c6164912f662d1200a2ff6187157c0b7baab1669d2572293e09bdaaddaa6d68
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of links pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary function of this document is to act as a link farm, likely to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=equal+rights+act PDF link annotation
    • http://flygarfield.net/userfiles/file/72134172454.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4801b1f209.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/fdb17bfaf4bc8dd3886b11981da33bd8/79857575041.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/jatewibivug.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2f5118c63---75000995970.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a869142bfe---jimonepunewe.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/113a5ce6a361eeada89dd66888adebeb/mamoturabupu.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ddee74993---72911255549.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/db986eb87233425732e25dec84a6f31d/luzuziz.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/87052044533.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75a8be939---24344239755.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160836214bc1d2---33402591956.pdfIn PDF document text
    • http://theshippyfamily.com/clients/57051/File/woviw.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/kerogekux.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/33659924bf754cd3fc6fd6124d9e3a48/timofud.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b19c2d458---96375305870.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831b8d17c7---kukazozikol.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/ropejelopuresojebi.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e633150550---durulijujujufononaganariz.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd2c9d51c---sajoloxafozupotef.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/d7976d8756986b71ca4837ef49dbabc0/53655650935.pdfIn PDF document text
    • http://isgsrl.it/images/file/1448115070.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/zimaxalunadukedeka.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 10384 bytes
SHA-256: 1a5f6e68d58b646d9e7950d060628b6a2c5e473c4d4301e0d8fc1f443334deb9
font_01_sfnt_off00011674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E86 18256 bytes
SHA-256: feb6045a299e22680921d688c66bda0615f580aa01d675c84a2b72cab4ffd9f2

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