Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0fed72cd320209…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 02:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 17982571ff65bb68baa577b6b7609b0c SHA-1: 958c96136dd5ff8bbae3c21c2587825547ed8e62 SHA-256: ce0fed72cd3202092463164c5f68e303a7627e847687f2bf989fc37e7c54f660
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage and disposable hosting. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the document's structure and numerous links suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://omgmediatank.com/userfiles/files/kobokebugagejojinevosik.pdf In PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/56c7f7e2ee942400c11b8853a5ee69e5/63897619718.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088684b574bd---77141591565.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/81330284634.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/aebcs0pm5l4ppr6bljbd7r5rk0/73607758770.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7d134b14---wadepepuvu.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/xaleloveribom.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/webifarane.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608359efa493f---99603885526.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757231544d0---raxubamabasuvagojozurijav.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/baxamus.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16074221c0eb31---65852726179.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b58ed55e367---96532945386.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/meratebisozopamosasuputa.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609004ced705a---jupivevabumomadi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b18d0f9751e21a691aa710ab1676a6d4/71354923631.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/57e9d0ae3f1ee5dbd454c731f4a960a4/7648302976.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1b243fec1769293d1fe8a4430f8cc489/41706034221.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/nufadubeziwalibarekaz.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/60101424828.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/89639007041.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace980a407a---50077303484.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9feca9bcfbd4f213b6a6c1be7dfdfe75/derexiwapixanowukevaf.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/xabebojefef.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b378c7ac88---nojipedejijuzulexo.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7b54050d---bedubedejapejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=physical+properties+intensivePDF 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_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 16684 bytes
SHA-256: 8c7213750f7dd566ce7ac95e4840c85eff7aaaa85f50106c0a79f9275d9eb5b3
font_01_sfnt_off00011637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 10652 bytes
SHA-256: 07aaa6628235ee51171629df582982a98e9bf4daa713b24095ccea44e19cf50f