Malicious PDF — malware analysis report

Static analysis result for SHA-256 9325d095f69fe10b…

MALICIOUS

PDF

78.4 KB Created: 2021-09-23 08:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69c544b2f9c3a829ee93f6c92739c20e SHA-1: ae84d24cc46773fab16f72f6994858125cb652f2 SHA-256: 9325d095f69fe10b4b18ffd82231ff8b94d84407020ce515f36956417e8d9409
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://philabc.ru/uplcv?utm_term=how+to+upload+file+from+phone+to+computer PDF link annotation
    • http://ccswcd.com/userfiles/file/degedijinotij.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/lusigovikufomutew.pdfIn PDF document text
    • https://korankertas.com/contents/files/68106607023.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/setogaxavoxakejesuf.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/lanatafosewavuwafugu.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9593750f4a6e3307bc4f996ce96f92ea/xalemijinufoxu.pdfIn PDF document text
    • https://raljob.com/userfiles/file/dekazosizovogiw.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/35577916709.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/gotexopepenopazudaxete.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/77100211119.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c7c80b71d1ffc4f34835286a5212cad2/fumisotosujesukif.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/mubupevutalomutarerim.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/23809158128.pdfIn PDF document text
    • http://meta-min.com/files/jalevodetusut.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/zunawif.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/bazitodikenasorasonur.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bewuvufinexesozixazinig.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/firokutewexidorakekurufi.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613416facee51---85631289869.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/winarusuzewatonid.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/gimilivitivenanobo.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///15072978540.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/29968663982.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137712a9d0f2---82682291963.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/68349385044.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449c9166e76---rolodib.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_off0000cfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC6 16688 bytes
SHA-256: 0e1b5f95e610d8a7b9f162f21cf74b6ef83145e2fc63ffac0865c787694cc463
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10892 bytes
SHA-256: d6489dcf54e155f45ec75c59104168bfbdca633e203656515f63d9be938ffc68
font_02_sfnt_off000113e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1