Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3298150455d5b8…

MALICIOUS

PDF

69.9 KB Created: 2021-10-02 14:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3c435baeb747316dd05ffb8d98642b12 SHA-1: fe1b3d47f1099ceacd219456bbeb8c8813c7c49d SHA-256: 1e3298150455d5b8736618cbee70f90e13d907b58e66a1a3bdd2c635742de76f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 http://jmyhship.com/uploadfile/files/96961645762.pdf In PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/vatopekakubezigaf.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/wavatefotobokubujedosa.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/80573010962.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/livolu.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/5062811866.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/vexefizizifik.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/414610807.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2acf76745---21552862778.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/21/82200863888.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/vusofuboxatimobajeluj.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/34094355888.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/lazof.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/vosevurovodar.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/zaxapixelopigade.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f31b5e91a8---beguzowipelesagogiwipu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312039afd77---gexemefosofefubavusugiko.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/25619170478.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/bosagibigotojevi.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/23437052743.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/87521634881.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210929112145.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1a064ee9c---61103465333.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/vizoraponenuzixefizid.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0452b1e5f---pejanaxe.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/sugitab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=half+a+stone+in+kgPDF link annotation
    • 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_off0000b31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 15856 bytes
SHA-256: c51fa2e75cb2162be751bfe72cbe9beb3f22ce8d71b0511d5136dbefa16d17a8
font_02_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 10372 bytes
SHA-256: fb99670a7c1479b900c0a4a90cfd409d6a7bb0c5682f22a709371d9bfb7be56c