Malicious PDF — malware analysis report

Static analysis result for SHA-256 c045479595b3dc08…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 09:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cd727d5397325f2457a17becfa4147a7 SHA-1: 7125359c52fc58a471a6e80b1f6c3ca6010f9849 SHA-256: c045479595b3dc0846449141dc87f16a218603cf8ac47f5b09691d37acd45aeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in one URL indicates a potential phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=carried+out+meaning+in+tamil PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16137ec8b6f8e0---78175789676.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/lupejupepivuwojiliwumoxe.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/68881069539.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/sogegijuzazop.pdfIn PDF document text
    • https://hobbypet.cz/files/file/reronoder.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/32628777806.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/tosexapagivivetemokati.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/94952492123.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/53748659890.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/27578457706.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/31170617829.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/mazizewewogilirasatokuro.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/gigatupiwiluboxifo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141e1127ec30---98184697257.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/dasikixogariliv.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/24141273186.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/5035915522.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/d63d28432c232bf5bb982d5a3c78a577/gejeka.pdfIn PDF document text
    • http://heizler.hu/files/file/zazaxodav.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/barupojemesavuwitime.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/wekadufuwuluf.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/vumivulalumixe.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/kufax.pdfIn PDF document text
    • https://forum-auto.ru/data/files/In 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_off0000b23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4F 15276 bytes
SHA-256: 2c0d89d7b73cedad99d27c5ff4b9c74d4721f02bd46b1fdb905d46027c8fda45
font_02_sfnt_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 10552 bytes
SHA-256: 60b8b491b701de0d195b015ced3ddde42059a376a91cd71bfa977d3d5acb6081