Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83970682bd23118…

MALICIOUS

PDF

87.8 KB Created: 2021-09-22 17:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c59fde6056fbb4b4fac46732f23a40c SHA-1: 5db12ace0cbfcb6d90328653e591694df40f504a SHA-256: f83970682bd23118b9dc6e7f68ffdf11c1db2d43b68fb41e035c0d42fd3eeda3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the PDF structure suggest potential for JavaScript execution to facilitate redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/u8j5noag9j7q0fu3i1e5klhuhn/2899031196.pdf In PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/feliburumudabez.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n4ma4j16utp104luovulu8n7l2/vafoxijubagajalorilata.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613edc0e05516---tibixomuwimewag.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614821b6655cc---jovabijoluva.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109051744376844.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f5f1de2ffb547683cfa770f0aea18d2a/58536578795.pdfIn PDF document text
    • https://afayl.com/userfiles/file/17097602873.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/duvemonekewik.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613775837c5c5---mamumu.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/pefipuxoxo.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/65443767915.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/16653637815.pdfIn PDF document text
    • http://lawngo.net/fckfiles/57797734474.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16130d22d28848---66351542651.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/sofegejurumixugogulito.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/lofobuvenumilisatidem.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/zomebakuxonajo.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/11503724986.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/82739063601.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/d4d143d378d437a7f780c32fdc9bdb18.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/eab28f2d7027aa5e6b53ac7a659903b6/gusoridupevosojalanagub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=morning+has+broken+pdfPDF 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_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 20744 bytes
SHA-256: e355feb9ef9f5886f2dbdf00d41fd9e39f9508f1b88cd17276867dca85f8dc78
font_01_sfnt_off00012198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AF 10856 bytes
SHA-256: c5ccba9fb6726b9b8110eef2998aac8b9317130aae9101ac3a8bde69c7e64614

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