Malicious PDF — malware analysis report

Static analysis result for SHA-256 4610fce7a307be1d…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 02:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9b4303fcc30864831755d88b147900af SHA-1: cfe5201b10bc67f9fb81f43ce97ad9da1d16d7fd SHA-256: 4610fce7a307be1dccc72ec0942fa13411ccfaf878b45199ca3cff11d928213e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160757a3429030---93633867482.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f1b2731b5a4f1f017587d969e5c01528/51458240014.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/16506577804.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1d1d18d1---jekoxulebenujo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/aa4f343c6a5e96db6b0830f3133512d2/17934866434.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b032323b---352835242.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/21714604113.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/samefitawesad.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/basodimasefirawiziwofok.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4934b55da5---78669890365.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/6855bf584873ffae14fd4973af953213/55509832223.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3995e05b6e---varesapojag.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/91ukb23fmcsv4jslb3nkpu2lvn/jaxeratimitasenufetezab.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/af39251fc74eae4707cab709b0572a74/93931848540.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0e2d3f3264284dde88a79c6bb669b11c/dizofebegopotolivade.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609749d50919b---77727334649.pdfIn PDF document text
    • http://446888.top/userfiles/file/lofananime.pdfIn PDF document text
    • http://techbis.pl/files/file/84728912517.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/xewojiwaxon.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/fisag.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/17c1a3dec6eeebae6026fb2948cff891/9307210235.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/33007434894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=34+weeks+pregnant+baby+weight+in+gramsPDF 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_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 15660 bytes
SHA-256: c3997a929446c2dfa91f3629a200a6cc5c10e13cebfac11d67f14f3aa7a5cb00
font_01_sfnt_off00011e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E21 11116 bytes
SHA-256: 76bc8afaa057ffb3f1de6af56f6c5efc4acbb8530444f14b783e12e91e15d67c
font_02_sfnt_off000137cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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