Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5e3ba4752c0791…

MALICIOUS

PDF

92.6 KB Created: 2021-09-01 19:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a612108a808b6f26f168a826c07700cc SHA-1: 7b4241729b3981ceb2218ff36921283156ca9aea SHA-256: 2e5e3ba4752c079176d1f1aeb3fb8b1cd1823f41f825b500754cc0fc4a91890b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=white+small+dog+with+curly+hair PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b2555425d---30355574926.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/jilijemidukoroxof.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/30747243876.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/14493857966.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/zibusepiligidotut.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/47588703963.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c859e89f4a4---66950586958.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/96122081307.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/83565187543.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7504c1c9a36a742cf4e1f1549e9322c9/2309530822.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/numufivowovoxuzivare.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/lontd6q9dkrht7i1od834rj2sl/zofidatuzotizesijejufami.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b581a39f7a---funitusodemedakijut.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/67397237366aac2e6634c6fe4eaf3a9e/34214969846.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f536f580a5e---tepixoravig.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/dimekelefologasetupudevug.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a4d93ea71---tudiravopebisuvigeze.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97ab7d1e2d---xipewefataguvupi.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/zidelatikopawonajanosi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607731ea313ae---norutufukoradinuvupores.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e2d4b35de5309bcfe09cd70dc2e28f14/pafubarovifufam.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5edcdd3ec---11543517489.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/vapemifapoxelitisekewalo.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_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 18252 bytes
SHA-256: c19096fc5666a609be8feeef910148dce15f9d791342b7ff066696592a79ee28
font_01_sfnt_off0001323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323D 11004 bytes
SHA-256: ffc35da27c7e6b9de88a6444be7e0fb1c38f35bc7eac71abc23e50c3951b0f4b
font_02_sfnt_off00014bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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