Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6fb2966387ba0a…

MALICIOUS

PDF

78.1 KB Created: 2021-06-30 22:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5cba69643631c10a2ae3480189486e3 SHA-1: 3c26b8d81cf97ad6344affbc2ded46839dbab443 SHA-256: 0e6fb2966387ba0a1e97956f9f352dd252566fdb343dc1e269256ceab3f84497
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs pointing to compromised WordPress sites and disposable hosting suggest a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://philabc.ru/uplcv?utm_term=marshall+nc+to+asheville+nc
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aad53afbc5---80090823905.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608359dcadeee---keguw.pdf
    • http://atraba-holding.com/userfiles/file/54933963700.pdf
    • https://diphong.com/uploads/6214869930.pdf
    • http://buergerforum-tirol.at/file/betoferemozazobiluruwax.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab596b5fad2---38742702519.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/449d2383eca4e8c6585b5e4149cd55dd/63612433318.pdf
    • http://aarogyamedico.com/userfiles/file/naluti.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097591f3a905---sewivopibowigod.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b786536eab9de6c793f84480381e63dc/47185200819.pdf
    • http://eva.am/files/2ccbfde817706339.pdf
    • http://coreaad.com/DreamDataUpload/file/81557234075.pdf
    • http://alphasigmaoverseas.com/userfiles/file/lasikam.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/8et615m4n7vcnjg9reo936m1u0/3000114628.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/717100f522a6d27f833b7b04c0c64807/teligonudarumaxufenuv.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bded276b5dd---81767612757.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ej1vui24hu60eg983lqt77uv81/zogubogotediduvefajazux.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/47e8acf34dd7e18b3da930cf2fe79429/12315353924.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/fonetavasonanukarobumap.pdf
    • http://chothuethietbi.info/img/files/buwikafulotiwavim.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55205c2bfa---xoladozobarawo.pdf
    • https://nhachoxebus.com/upload/fck/file/nibelu.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3d3252c0e---58445729805.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ntkch9940pqhop0vnh1fd5eieu/45811808235.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf4.bin
2589f835d982c84a242bb3ae4eea6b582c561cabb5f4c05fab4cd1a4be9d706f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 10384 bytes
font_01_sfnt_off0000e470.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 16792 bytes
font_02_sfnt_off0000fc82.bin
89c5bb2d8cc6fb754664951533b057dab4847921d89c9aeedc32960f1a199228
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 17944 bytes