Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5060cc82e2669f…

MALICIOUS

PDF

70.8 KB Created: 2021-09-23 23:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cddb6ab4d9ffd558cd9755abbcae2843 SHA-1: 4956a3a1cddf0f51d390fc5caf545fd568f88c76 SHA-256: 8b5060cc82e2669fde893871e6443e6b176971c01cfd71d1f769ae77fffb61c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=shark+value+mm2 PDF link annotation
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa68c0647---rabiwuzugafawenox.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/bebojuxotupefinorakuji.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/sawufosimalubogozixine.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/59396373136.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614460515d558---sabipezalemogasudevures.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/kejekafejidawebevijan.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/jabolizopove.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/33374518372.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/93448173380.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/zazodewixetu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1db866c51---47182562002.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/fapobajinuzo.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/11423486914.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161434afaca6c5---74891249375.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/koxojolenevebobab.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/gilaf.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/22450206025.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ee9bcf206f1bf026b79a0fd45af69efc/74075532565.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/zobosufovevaxenam.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/87230813336.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed4e51db8c---fomolafajaxupage.pdfIn PDF document text
    • http://519pf.com/userfiles/files/58243511434.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/jedan.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210905122814.pdfIn PDF document text
    • 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_off0000b342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB342 16884 bytes
SHA-256: 1f7167ac27bdfb3fc1b2459a082e0fe476897b23ca887a6e46cdacc453174400
font_01_sfnt_off0000df01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF01 10244 bytes
SHA-256: 7d9f54607a6a7856b9773b8bf433950e51c7ab79b3f6db598500abbb392f35b4
font_02_sfnt_off0000f61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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