Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee28bd82c4ac595…

MALICIOUS

PDF

85.2 KB Created: 2021-07-17 15:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a326ae7c73957ab3ebf5b74c86139b50 SHA-1: 40909f369d7680243c619f8ed37ed07669226489 SHA-256: 1ee28bd82c4ac595c22d2201eb258c489ca4360e5b715a596beec65a3fcf78e1
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. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content hosted on these sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e1d4e12e---9919400641.pdf In PDF document text
    • https://deesudcoolingtower.com/userfiles/file/zunetuzagerepufimij.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e95110e8a---56505777473.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/tawafidafiju.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c16006e74ff---fuvumexeguwozewituzole.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e500b9f6165381ffaac9c1106786ec94/pizivatonire.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077b91ea9d38---18286845949.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/sanumogewakanonojud.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/9a1d8cc97646a1781e37196fcad1d68e/56729231802.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fa9b2a30ca8e2e6ec1611545b33f1e0f/koturujakunus.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/mevutuni.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/zifogoran.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/d9prbr9n17ttovn4s368s8loar/84410932703.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/gufiguzepo.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a89fb05b1---77084659593.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ba280b160e0f11ef9c48714d93f1525a/70171756280.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/b4hp4mvt6uvflm1jik54kd0097/finan.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2fe7f412---duragasejudixuk.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/3gkgso7odlm57rapmejljt9i15/tirod.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a41c77cb487---99801590347.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/sulipemamexumurazi.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/pejigufazi.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/78d3f9756387ad3452bcefe26c8d457a/68829249583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=indifference+curve+excelPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75cf0b7afe---pebajoniluminuf.pdfIn PDF document text
    • 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_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10140 bytes
SHA-256: 05cbcd06647813e9c45731a09b42a0803e15f6efddcdb6d0856196a758cbba5b
font_02_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 17068 bytes
SHA-256: 1d9fd77c4b099dac6563ddcd1dec583b4de335d0c48a4cc5a1d11d0597245a5b

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