Malicious PDF — malware analysis report

Static analysis result for SHA-256 294fe86e1599e1e3…

MALICIOUS

PDF

76.8 KB Created: 2021-09-01 13:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 75e968d4c3ec0c592f8b8a355054b4d2 SHA-1: 033ed68bb8da773de9ea990c1227bc4f7a7cbf9c SHA-256: 294fe86e1599e1e3f69f8f8b18a6112fa5ec466a1860412ae7e3b993f59f8e4f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple links on disposable or compromised hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16126f07e6867e---telawabarutopuwepo.pdf In PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/89318229095.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/tadejinaf.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/beb0722d17ca2fc9e931767f7548f0d3/80773364610.pdfIn PDF document text
    • http://sgpeo.pl/users/file/10119442577.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a46374249---74894037335.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3e04886f---85625229945.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/semowilamajeg.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/86e0b8f99ad82a26e22cb5b4283fe97a/74813244349.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/81040426424.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b5a1ee50e64584be6c8d66bb7471e8ec/jameguwemenonukeri.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/14934077389.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zukojejir.pdfIn PDF document text
    • http://wohntraumgmbh.at/gebupogufu.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/xowaviro.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/40550167945.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/53747642910.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/mubidazapupenopav.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb5fb36f32---72743544840.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/xuvil.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/sevos.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/44831401685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chinese+new+year+reading+comprehensionPDF 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_off0000c898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC898 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 11048 bytes
SHA-256: 5f31b1427025aaf9371dddfc3bd563f4c2a3156cf01e99298313ca19ef75b3e1
font_02_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 16536 bytes
SHA-256: 36688d7027334d96238365640b2f28206947322c18b8a9ad345ff9956fdd072e

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