Malicious PDF — malware analysis report

Static analysis result for SHA-256 1725d08fe6d2969f…

MALICIOUS

PDF

78.7 KB Created: 2021-07-25 17:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a9730bcf9b0d28061e073fb06d9bf5cf SHA-1: 35bd339ccc3f821da16ca35e0da64609c8630dd4 SHA-256: 1725d08fe6d2969f024f74af6bfca021d278ed67f6010e96c738602264ca0938
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 functions as a link farm, containing numerous embedded URLs that point to various domains, some of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://cargotavio.ru/files/file/67997028224.pdf In PDF document text
    • http://armanetti.com/images/vozajujekixilikesumumo.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/bijipalexadol.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086c945a3240---20274655064.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/4015961961.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2d55b73e125139b665c6aca0a64fc817/xajaxikogizakonepol.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076a948cfc2c---xejafafewudobirofoz.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/9454efe8d6626ae2104a034a93b77814/63398436840.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5cd0c95bc---rizomazizet.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/88797164162.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c42cc84a9a---73363086746.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/rivimobixuwuwoled.pdfIn PDF document text
    • http://aimic.com/userfiles/file/32870210593.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/437b0afd82694bc462ce0bf330d14c6e/12148302454.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/70205302830.pdfIn PDF document text
    • https://diphong.com/uploads/64928434890.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/fajezovib.pdfIn PDF document text
    • http://computerdoki.hu/user/file/peretujuwenefepe.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/48069292358.pdfIn PDF document text
    • http://debden.org/userfiles/file/lasosajefuveb.pdfIn PDF document text
    • http://garderoba.sk/images/_file/semexuxonepenonebi.pdfIn PDF document text
    • https://ever-progress.com/upload/files/vusakedudekamutemadobu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/069a63db4f03f426f155e8dd47e8dfeb/43961005866.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2744cc28d4---69423355796.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740a022717c---davebabukedabenedipenij.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/97628657243.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/sepegepisojizox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pedro+lenza+direito+constitucional+esquematizado+pdf+2020PDF 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_off0000cb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7F 11332 bytes
SHA-256: d180056b0d89f6b4448f15f9bb03c15a88eba7248b47df6b6bb98a830dd49ad9
font_01_sfnt_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 18200 bytes
SHA-256: 9a2d278ff1a0ce0ba48eb6cf429b27a51fcc5bc4669eed7b12bb885003f26361

Open this report in the interactive analyzer, or submit your own file for analysis.