Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea8570086adf1ae…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 20:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c07a425addf46b069a932266f8ff6d69 SHA-1: 178db545c30f2ef163f6540c06510e1de7d7dfe3 SHA-256: 5ea8570086adf1ae7930b215bd8e16f2695a28195b68507690e560fc0b8b9f9d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary goal appears to be directing users to potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.smartlandgroup.com/ckfinder/userfiles/files/mutovofuvutimapagevug.pdf In PDF document text
    • https://kalitelivideoizle.com/resimler/files/kiwasunoxijisulufovaxeku.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/xovojuf.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/36539298097.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/gugitulazifitux.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/zinavazufatolat.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210906_818875BFFDA3E3F7.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/nufosewif.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/feloru.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/rulagovugovupitoxoriti.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/lufewareb.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613267da8b1f1---jazoxowonukiwupodi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613413635ff14---11718576451.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/bumunawedojutovamekinosiv.pdfIn PDF document text
    • https://pcetravel.com/files/file/vosifamorunikororesu.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/57037388638.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304c35e83e0---jozabevotivemotel.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/86132071714.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/81368546289.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/94697234988.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/gofeguribu.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/42800551364.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/43639211668.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebce004188---88742000115.pdfIn PDF document text
    • https://mar3ol.com/Files/files/geverudovoguf.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/6692297982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=adjectives+that+start+with+kPDF 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_off0000dcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC0 10552 bytes
SHA-256: c71370665191b62986bedba2db618c7631a3f75173282d5217e122782356e276
font_01_sfnt_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D17 17692 bytes
SHA-256: b8ea605c4ad427c58d81b751881c5f025f6cdcfda54799e46a224ca3758822f0

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