Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dae4b88af660a78…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 15:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7112d72c83f17eafe47f2f4766c2d9a4 SHA-1: af7353eeb383d28607c0e432fedc00bb45da5d8c SHA-256: 0dae4b88af660a78528517b7a890de1e6381e64d4d38f879ef77a82933d4dad9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of a 'Password-protected archive handoff' heuristic indicates a common tactic to bypass security gateways by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=how+long+is+a+military+click PDF link annotation
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6d2d47bebd5045ae0ff687e1c61d199d/79885965269.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/venetujise.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/kafopuzex.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18cadc00b---39343785127.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160853fed6818b---6962239136.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/68095496090.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/49443504582.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/49241492752.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/885c76458bbbd6ec5042afe1434d8843/44616261093.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/674071c4f87b5d12d9f21dd4be74aa89/75699188177.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/a3ed0a70c2367b31df973ee05eaefca6/fetawivitavupazefasoge.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d431ae27---mafizukivorog.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/putaforokugenekajobufojif.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c568e6a91b7---midix.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/punedowekegupegow.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/88280586c8b97b1c33a31545b9c2e57f/45844995462.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92623048b---zofafetapewut.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/18016827a5489897e7826cf775f5a086/wimexamesovuta.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926b1749fea---fewur.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428215524198.pdfIn PDF document text
    • https://bursac.net/userfiles/file/pebubozasimelikixeparutis.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/2dbk8fma6uv49jcekpl0911d3h/60280607210.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/er852ncuiqpehq1km7vhcoi81r/68018483402.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04ce40992e---85672317469.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/c63265356298dcee0db12fa3c734d9c9/mizowagovizi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 17624 bytes
SHA-256: 762c38260c62f86ef2b7c82d53f2022ffd9d349f943de013ad39035fa2e6ac6a
font_01_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 10724 bytes
SHA-256: 6a459b5aff39b69bbdab8b96ccc4f2b8c2fb53868fefbaa60a23cfe4f5f0b41d
font_02_sfnt_off000143de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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