Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade6ea86f19a4404…

MALICIOUS

PDF

106.9 KB Created: 2021-07-08 14:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b558875dd18435784e153cd419dd7e0d SHA-1: 2656e1b7f54e1c83af00264cd5c289e2ddc182fa SHA-256: ade6ea86f19a4404c02f766889902d5ee403423d74b3860784c0a599309b59c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting, suggesting a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6718ad220f---nomogawafuw.pdf In PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1b03918cf242c0e47aaa47e241d45820/fodubi.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/4718107324.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/pasunosotinezum.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/243ca16294f373132561986717ce6b11/vipepivomuranixixetos.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/savasodoxijosekubo.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/xugito.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d11dcf13e---80700896664.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/de02e7a2bc9901356d61c189d39616bf/tuwazi.pdfIn PDF document text
    • https://ccskin.com/geektic/files/25486147709.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cff521f33e2---durotediwolemojolareful.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6efc5b73---tatanufowatozibere.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/99714735121.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/majevejivililamage.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c0dc278e4---risomuzovagami.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ddd888c50133341d8680d90dfeb4c0f0/zatubap.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/c809ac84d19efe20b6724932de7c8ea5/vekitesufulakerego.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/58881932020.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/af9a162f1b2119a8d6548b94d4582a18/44000267163.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d35697551e---8936588933.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d89fb43e8fcd83da438ec7ddac76520e/vesexizev.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609643c9003f9---58837523426.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/bilogoxajujepetelapil.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ciub8uepuuim1td5m56qfvaep2/222110893.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac139364b4e---vufuxo.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a30bf01285cdfbd7aecb9b0b0b8c16fe/54098407789.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d3e9adcbe---gufexitizidoruruk.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/63027258936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=theories+of+organization+in+public+administrationPDF 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_off00014006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14006 11332 bytes
SHA-256: 831550ff3f20077ec9e1f0f393a175dcab30edf1e09d11291d4c0f28af8f104e
font_01_sfnt_off00015a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A1A 16776 bytes
SHA-256: d98636b7791a647287a414664f7daa30b4905b52ea98b3d73c883cbbb67b434d
font_02_sfnt_off000185c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1