Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b6246dcc632c0a…

MALICIOUS

PDF

102.0 KB Created: 2021-08-19 13:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae87ae4cc6837f95fcb9f1862e4b9ab5 SHA-1: b2639dc473def8dca8279ec27bc48f1dca0cdc37 SHA-256: e4b6246dcc632c0a7a157e3b54922a035319c1c9dcb3cde3112f5692a0b7f98d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to numerous compromised websites, as indicated by multiple heuristics including 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161013f31f386e---fupatosebedek.pdf In PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/891772837337c57812f3bb45d48dffac/wobawuxawibogebek.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210709174556.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/19257423916.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/63149183887.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/pb064li8t3aattunj5c0ranr54/35458027916.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21e9f85011---kakivu.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/mugifegowopowibibuk.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607096d1c6bec---nulakirovipajovijaxorem.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/1ac7f07b6effaea13fbdd8090224dcd6/fipowimenokix.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/41309005157.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/vunobelonopa.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/aa418468c12376004dfc764c022c277b/nijiwuwukekuv.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/usfnvsglebudm3m619r74di68e/48117038408.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/20947081145.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/54843409081.pdfIn PDF document text
    • http://napiarsaigh.com/images/mefigozefal.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/57649868560.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/37954619000.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecb3fbc390---28430287352.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/5e3e281770ae862c6e95344cf03990d5/fabudetirarar.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/tm0uq8e5n2ep1diuhrm66uma1c/23646262321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=word+on+the+vine+worksheet+answersPDF 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_off00012b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B30 10536 bytes
SHA-256: 6cafaa223d1504f29f15c83f09fd2677f49af063d65e1a70b13d7f38256300e6
font_01_sfnt_off00014330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14330 17396 bytes
SHA-256: 66d97ab73fad06ea8e6c85277025ad548ad588aca75d95e66109360ce1631138
font_02_sfnt_off00017092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17092 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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