Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90c6b4aa910a691…

MALICIOUS

PDF

74.4 KB Created: 2021-09-06 03:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 541abf850b9c16589b61088a8f380938 SHA-1: 89282c4d2331e64936f8296f6b118dbfc164dde5 SHA-256: d90c6b4aa910a691870520a31927a1e1451c7ef6ecc813566c6fc502e8e451b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple compromised websites, likely to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5abd040ff9fb295de0f810f19986e634/dobivizuxuzapekeroxifapon.pdf In PDF document text
    • http://vning.net/filespath/files/20210819051845.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/598336d5d64e021e7d886d0d44a621d7/46944592294.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc4a38b4d---94444633093.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609da78089380---45614999147.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf4507d5f---93463322001.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/e762d119b0ca3923e90b2de1f2daecc3/44685588158.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/domugoliturukoro.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/62347091478.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/51434123680.pdfIn PDF document text
    • http://www.bash.cl/media/file/muredozubofiwavimu.pdfIn PDF document text
    • http://taxfreepoint.com/file/bisuxuridumumoso.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/gutixejimud.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/fcc52f5fdff04d73e8d7daf00c95af64/taropekivej.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/46442321508.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dae2a2abe---61419515570.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/punizerusunodoriboxe.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/91583432512.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/gipozegirag.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910408d69f3---2749132.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/1330518526.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a873694c---84732629620.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/dipelerag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=deutsch+b1+lesen+%C3%BCbungen+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD612 10912 bytes
SHA-256: 9338af9b6b93844b86e8b4ffbc09ed67cd3999b893316cab28557d14559e3ddd
font_02_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 17080 bytes
SHA-256: ce167a4d4560eafad57713539ab25e654603f6ee5a4292efa2e7f2cbf2a724a3

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