Malicious PDF — malware analysis report

Static analysis result for SHA-256 872067b1720ab552…

MALICIOUS

PDF

118.8 KB Created: 2021-09-04 17:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 06d8bafa311375872dee4f3d4a2c3e16 SHA-1: 630bd6e3a67ccbbe02e34f8848479b67f692d533 SHA-256: 872067b1720ab552c1d4535882c12fe86e219546fee3f64ecb23cd087365be2d
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites. Several of these links point to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://medsplus.us/admin/images/file/xekojuxapar.pdf In PDF document text
    • http://www.hon-ro.hu/userfiles/files/94530995567.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096290978659---1644489215.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e97a26e5d3d33b4a3099a7245b69f1f6/84084116685.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/70874873487.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcada5a66d---zalikakuwusox.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/44029479358.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160744a87ab841---wefaxaxifefidepamadot.pdfIn PDF document text
    • https://digireg.pl/upload/68462424595.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/88415602591.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/mosoxanefuditubovuxefe.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/giguxeraxosika.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/ketaxuf.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0953df0ae7---jaregurixevogid.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160773dd30f533---28335889623.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d227e616fe---givawapurulojasarezejim.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/18836056981.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/pilemavanabixo.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/xomizokamomelixefosuxova.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26bca7cb08---12102878406.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/82003757640.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/6096799861.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/e5e37e6d2213000fa82c2fb11b163a53/vevuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=le+patrimoine+culturel+en+droit+international+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16027 24792 bytes
SHA-256: 4d3f15404bf660e86d9bada096bcf55aa7413fb345d286772461475db043bfca
font_02_sfnt_off00019d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D11 10668 bytes
SHA-256: b8d201ea1cc26b4f5a5434d11fe21917e8fe194fdaca2e3a9ce32b127b3c15f6
font_03_sfnt_off0001b56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B56F 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1

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