Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9a6320657ce54c…

MALICIOUS

PDF

70.6 KB Created: 2021-09-14 21:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bfc91b755ecec58f8c4a042efd7c440d SHA-1: 356a352b4a87be0768c1545098eb821e5fa73341 SHA-256: cc9a6320657ce54c02cc3fa60a642f38012233efd551c33a66eccdf7fc9b8701
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

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 https://marljivo.hr/userfiles/file/bafoxiseda.pdf In PDF document text
    • http://wingmanresearch.com/userfiles/files/6368805903.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/sotapabof.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/japusonazapipisari.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/sofon.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/bojizariferipetasowew.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/dudubemelomuseluzenajusaf.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/15426417141.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/94614900649.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/joliregilumuwokifef.pdfIn PDF document text
    • https://losungversorger.com/product/file/38464808750.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc8882ac2c---duvodiwikezav.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/47888264454.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/sejupivigotifuvosu.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/84713892912.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fcac66c45---40820379804.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/kakafujuxikawamew.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/nejaz.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161335ed5515b4---48157679583.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/pexepolovugazebi.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/73uhmom0tk6o7uecnoijj1j2lk/72765495021.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/73973318402.pdfIn PDF document text
    • http://full814.com/upload/files/18197371276.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/150a93fcfd40a2b9202e938e97f4addf/butesogubejomegixude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=video+hub+apkPDF 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_off0000b588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9A 15960 bytes
SHA-256: 7c920e1ffe8c00920914b051a9a13e1b430a6b2537fefd4fc18d71993acd3dff
font_02_sfnt_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 10272 bytes
SHA-256: bb8d119db7d9b2e62ef177318787d76984270c7e62ac90f044121f84611e439d

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