Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0f98da6a8f8509…

MALICIOUS

PDF

83.3 KB Created: 2021-08-23 19:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e3afdc8fdd9f2de56266f773c9bf8c23 SHA-1: b5222b9b474cb541f7eab7c1714bc90feaac5b98 SHA-256: 3d0f98da6a8f85095750bcf742898d1433d17b85cc70961bb9b91d560c8b42dd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c953a33ffd---87160186970.pdf In PDF document text
    • http://retailcop.ca/files/31642881181.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/wiluwijibul.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/38669926469.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210530081343545.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/80638333166.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bep1g3c697f32p74e95m1hu183/welodabofabip.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/balipemitufad.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/gevufalomimogoz.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/goxijafib.pdfIn PDF document text
    • http://oodow.cn/upload/file/210629135358513715rxkgn31dbzvg.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d37f050afe73424bd4d4d42f81dabbf9/88441717302.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba26c1dde6c---sebajasavoro.pdfIn PDF document text
    • http://rc-modeller.se/images/file///21774876202.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/nalajajisagefetinamulala.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd67470954---xanapizajosigevideda.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a2ab5bd9b---peraga.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/mituvexux.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/24be3b34c2a7afe98a6846badf4a062f/kunek.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/52503172938.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/zivafilizenizigifag.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/jufexexo.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/34548431047f9c40fef36d877b5d2101/45483265688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=discoloration+in+tonguePDF 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_off0000e2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 16208 bytes
SHA-256: 4cb4e4acdda04bcbf76aeeb0edc48c4906a848d2be563e57286eaf3512d797c7
font_02_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 10504 bytes
SHA-256: d189c008376cfa935d29dac1e1ce21ea3c47226569fd47d0249e3eb7d38646ea

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