Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb6d302e42c2710…

MALICIOUS

PDF

70.9 KB Created: 2021-10-03 20:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 015c0cf1596b762cdf0f832a6d6271f6 SHA-1: 14fb6fb7ce1629b6f325e81de71d9bd5c1f7c7f8 SHA-256: 3eb6d302e42c2710a1fc1674be05acb19ca22f721ebccec3d1a065e822bca9ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=malaria+parasite+was+discovered+by PDF link annotation
    • http://thechitay.com/uploads/userfiles/file/71804752262.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/23306328276.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/64831462224.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/59354961294.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/kawidakinowoguve.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1615322b064549---jajurozarun.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/gelarubenaxux.pdfIn PDF document text
    • http://leeandrewdavison.com/download/pezozokimu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/52152682468.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/bovizeda.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/ronudomidopalutofarof.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/62350697364.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16140a4c645f45---32162199241.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/11918139403.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/36637222160.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/77909563827.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/75424672675.pdfIn PDF document text
    • http://brenderup.ro/mm/file/xojijupakewavomebexu.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/17375238908.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/kirarogavegeranupabaro.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/7650253542.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/92821899420.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/lapipinefuxilukejifarifox.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/watabugifalepogid.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/53103469466.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_off0000b329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB329 10804 bytes
SHA-256: 2f51e74d5e28b2af3d5ae931642c8ab8edd230d4440da7f0e63ca5d6876d10a0
font_01_sfnt_off0000cc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 16624 bytes
SHA-256: 301ca34411b2a3cbff9c0c5d47fd8a128c555c508bf283d5e4b544e787ff972a
font_02_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1