Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce2e9f4dbf2b09a…

MALICIOUS

PDF

89.3 KB Created: 2021-06-14 23:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d8e1a3539a79bfbaaf487677df70354a SHA-1: 62148e06d97e9f6273d7841e79bcfae7e5aae9ae SHA-256: 9ce2e9f4dbf2b09a0ac664790968a134e80d205551f6646be7915a07348c9db7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=llb+notes+pdf PDF link annotation
    • https://nnkcreations.com/userfiles/file/77064427286.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160862a8f3fa27---sigewisaganev.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/u1uoq9oeacgcm2n5ih28ogd843/96253774335.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file/%5C/2021060112023795.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/ehtk5j9boqjmpbniv3m3lldnah/xaboravowazefunexokuwo.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/44453352667.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd64239894---29371128070.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/2c2e54b76e63316b80d04de89ab36142/4146055191.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959e4dd5c40---46761806028.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad919e8bf60---32198101202.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942bacdfe7b---16936051195.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/1430796304.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6c2da58e8---monewabuduruperipaf.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/51076582645.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/69c5038a8a763f8768bf1b464cbfc85b/lorosavukabevapopodomezek.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kjjbil78dh16lk8keh3jmia7dc/tebofagenepivosij.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/betenot.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc8a64f8b---nodopezevixeladuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 4812 bytes
SHA-256: 7a8e90f58b9453b1ba2f153cafab85ab99a11d903f9dd3f28db5f0194c52c662
font_01_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 2892 bytes
SHA-256: d943bd5accff9d78eca4caac9c0777a2f20389e272e0d40da9846d9bb5e61ca2
font_02_sfnt_off0001109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109A 11084 bytes
SHA-256: 0b0733161f8589f305dad5ed8acf8f65360a3cf9cf52bcacef0dada035fcf0dc
font_03_sfnt_off0001369f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369F 9872 bytes
SHA-256: 633a6845e6488d70d986c8fc94748be050d07bb053f2bd19ec102a7207c37020

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