Malicious PDF — malware analysis report

Static analysis result for SHA-256 6349712fd877d06f…

MALICIOUS

PDF

95.8 KB Created: 2021-07-07 16:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14eaa48eebf6b51760ec6240a1500f9f SHA-1: 6822e498ee3339ebce4a498af1bd1aeeca302fb4 SHA-256: 6349712fd877d06f04d5074224b49f973a3a4433b9c3ec8713a1bbbabff8d577
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it is designed to lure users to malicious sites, potentially via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://medvor.ru/uplcv?utm_term=i+see+you+all+over+me+in+my+head+lyrics PDF link annotation
    • http://highgaincomposites.com/img/file/202162805136.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/15404067629.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d53cad29400d0f09aa64471c1ec9816e/84595264801.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c54146b28d3---74718296059.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/pewerewarorog.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/goxisudixuwavofijufamexum.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865e9681717---tugiziketigovovelagosisav.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608db0e63b9cb---90299233423.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/97512616718.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/56629968914.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160720771aa430---37990868753.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1edfabf61---xorurafurisilo.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/87254433923.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c7bc3af5---miwigipirexulededi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9ce12493b65c64c0f5cb443738fb35ba/dases.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/xinerijiz.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/83057749415.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca718a00d9---60720885784.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/kupagivagakisenoviridon.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/ruxuputeketafurufudotir.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/65345808064.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d606f9f6558e8c4cb9a79547f0efe05b/34833309509.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e77dcc52b---60216644663.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/c97b52f688161ab2614e91b065acb11c/94683779813.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_off00011468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 17336 bytes
SHA-256: ea3c15f94252b578464d83269bfe8101734e8c8314d5aed5427af6dd6b4b6948
font_01_sfnt_off000141c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C2 10768 bytes
SHA-256: b0e1df245f9be8fd94544a40c87dcb2a281c376a7fa5a6d438ef598db30c20b9
font_02_sfnt_off00015a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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