Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f5f9d6989ed229…

MALICIOUS

PDF

135.5 KB Created: 2021-08-10 21:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d6e8482c096d0d3c94cf2a0f3c7532c0 SHA-1: 949d57ae024a98c698f03549e56c1460d90c94d0 SHA-256: e6f5f9d6989ed229591271d316d81695ec43755dfb85d27bd8289997729cf021
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or SEO-abused content, rather than delivering a direct exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/t7r1uoou7igu2fmt3umpj0mnv5/81597302925.pdf In PDF document text
    • http://staropolski.net/Upload/file/finizugavurugotabodibami.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9a4702d2c660ec5a5e8d0068bb91d295/renexoburuzuwuxuvapezixis.pdfIn PDF document text
    • http://honda-vo.com/upload/file/59323096618.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f37b146f---tojusub.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd792f1ef99---supalemasunulotasin.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/voketonilafajig.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents//files/49595517435.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b24d0c5194---88773865994.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/36683998141.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2f9493a36cb38533410fa3f58966b6d6/nidivarepanitojugimida.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f5ff4efd582bae2be8ccdbc13612527f/bobasesiwebojekukeperoku.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/17886572044.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b86dce3c07884f5d641f79ee9e314fa3/nuseg.pdfIn PDF document text
    • http://praguetransfer.com/files/file/25430531340.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/pazisuzetovokoz.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/41434122835.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077321750ebe---32957742235.pdfIn PDF document text
    • https://topupdana.com/contents//files/56001242001.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/99503017709.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/vdgs3fl10i13rfg9q1079rvh1v/jixazusenaxasosef.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608513d1c2ea3---bigogol.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080db12083f3---pamuvegupasipijalatuxopi.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/pesumitoremafow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=2009+yamaha+fz6r+owners+manual+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_off0001a707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A707 11416 bytes
SHA-256: 52ecbec29144fc9c3872c4e29f59c3d75754ecf2946f76b8763bec3366fb2001
font_01_sfnt_off0001c1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9FB 19620 bytes
SHA-256: 5ed1d36f02f12d401c41ba2919b44e3293f5ed2724f7d7d928931e15c46e6c22

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