Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc6a44ffc422aff…

MALICIOUS

PDF

90.1 KB Created: 2021-06-28 16:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 40f50c34841cb5f4a63b6a75070eb03f SHA-1: c619415186804988747fff6ffbc7d1e2acc8cb9a SHA-256: cdc6a44ffc422aff69b4c4eaeaaaae727f1020c853db147f2a416b226b1ca769
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=minecraft+what+does+blast+protection+do PDF link annotation
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/76428dc8f4d9338ef08a79b417a35a57/petelu.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/60260329336.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/897468199c2cfbc994b289e79024fb0c/83890326151.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608104a88d395---57395955090.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4ptodnlpumlkuhil3l0urm1hue/49319808899.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/vamajo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/240714291400.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/48454796367.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/9ch6d9bll8a9oucui4kgdgqam1/16595954722.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/8311bf7bdbee8dcc1270e330eda9a0b4/nigigavixumo.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/xutaxopikivam.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/481adcc2814400623107b78764e8e06e/gabagamekeliv.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/26204264148.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5db12539---mitafirop.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/989d7e111d68d22faa976ba8f319ba21/lutuk.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c78d0c7c---sojisevavogukafuxoviz.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/34462015737.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/21777919419.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/sumat.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/dowubebadisozudakelejug.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1b7aaecba6258b2e927d9502d3c27c1f/7806008898.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9bb0r50lr9k1etia1jes1oefe7/66011919180.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16097445d6c9ac---zodugeresupud.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_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 18132 bytes
SHA-256: 6ad9a107567cc3e4f8709438039fc852a6336d93bd81797e6983f9fd4db8c613
font_01_sfnt_off00012a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14245 10936 bytes
SHA-256: 04f89fdc6ecd6200ab1b9d89a51a5cbb339cfc8240098612bc088c360538bdec

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