Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0bf93286743b5e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 03:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aff7a75d2464bf65920018164089d2ee SHA-1: 9765affca739cd8c5a8d1c07233f5bd6365e9887 SHA-256: ca0bf93286743b5eee2b22170c3fbc05c22955b48503d702687b6a7159ddf4c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://archism.ru/uplcv?utm_term=panis+angelicus+organ+and+voice+pdf PDF link annotation
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd27bad4f---81375445592.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/tagoru.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be8a9a74c9a---vekokoka.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/35857451186.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/42194447248.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/aad7889fe5544194d1554e5b88171536/botopelevokuxegak.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/63470776984.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a90800672---bufegezulapidonifovivuki.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/49a74124ba4494a38d879ec157693d70/kilexajubusisenulixozopi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pupebuwakemetipofu.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b306c5b37f5---15351882179.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/demab.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/nikemokunivubegem.pdfIn PDF document text
    • https://immobilgold.com/file/xulanokoviso.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610eb70c009f3---25250504728.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/4275562303.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0f8bf8a76dda49f0dd93979e38e385e3/30121036084.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd24e561dd---jasedofozozewetenuxut.pdfIn PDF document text
    • http://ihdbd.org/upload/files/26031148040.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/kavewov.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/466ef180733d78f18e125112a669d067/wiwafefivojarapamov.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/tejokov.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/42055099946.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/0bdfb8c9bc9140c70592745ba4af0182/zowunitumajaxanovebeka.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/85e2976ad503320cc7d39c8df47e3b44/lurubewexupil.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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 10864 bytes
SHA-256: 2468e99d77eeef061083a4ed36ae5fe485310b627546cfce6a8c990983260cb5
font_01_sfnt_off0000f41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41A 19340 bytes
SHA-256: 223892e4a81ee61ef305c44432f6f38fbae16c96f5b3c6ca5331116c224b1632
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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