Malicious PDF — malware analysis report

Static analysis result for SHA-256 2119bbe9602df4fa…

MALICIOUS

PDF

105.7 KB Created: 2021-09-20 19:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fae3b9a030c1d2113bac28e0e6a21162 SHA-1: 1334de2262ece8808cea6c71a5a4091fd54bb2a0 SHA-256: 2119bbe9602df4fa1583499a088a396bfd78b53d1b28b0206a2f28279624c442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is used to host and redirect to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://ikitellirezistans.com/upload/files/97762774004.pdf In PDF document text
    • https://dukra.sk/editor_uploads/files/52765450434.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/4430805125.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/35856331213.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/nakobapojiwudezapiwono.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/guvopu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/68327a995661e42fcb0c15ab161022e3/73082350951.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/74131977376.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/16a7e9daf9e7fe2195c1c4f7dae3479f/89963860684.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/rukobuwizap.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/kefagil.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/kadagumomi.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/31091743284.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021091118003380554.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/12481294877.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9d2a1e6e9---fipulogikimakajamulepum.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/21d6etqfo4la0iv9upfd51aafh/82117749723.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/49dtvirgt27p3quu81o66266i0/feketotedusufofufurotob.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/oc4af8ud7emld79r15qqpccp4i/23307697995.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/38689813108.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/jupege.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/89919275445.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7ba79ec4b---31321712055.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=finding+nemo+full+movie+in+tamil+tamilyogiPDF 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_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 19776 bytes
SHA-256: 0a434fab3fa86b145e5a9fbb6d2dab13668af0dd6bb4bbafc7eff6ff4d90f85f
font_01_sfnt_off00016870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18087 10684 bytes
SHA-256: d6f53bf0bf5185049a670e36146d10957fa076855619ddc6793b42510a056aee

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