Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef4b4aa8f1048c7…

MALICIOUS

PDF

74.2 KB Created: 2021-08-28 13:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3b225deaf805b4eb62c6638fb1bbdfa8 SHA-1: dbe4802a99aa0ef5c745c72167a58414b2d6be47 SHA-256: 2ef4b4aa8f1048c7ae79dbacd442b36ff87ac949a5d8e25b4bce39c748db8699
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure as a link farm is a common tactic for distributing malicious content or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://getracemirates.com/userfiles/files/velopa.pdf In PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606d11ada654e---jubuvetugupepitinebawop.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608252a7b404b---tedokexulilajuzilime.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/sofakijupopotasezan.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/pusanevazetawusufuwo.pdfIn PDF document text
    • https://icbacademy.com/upload/files/wolosujivejedaki.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609804d4e1418---pekuwugobomonokawoxisu.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/jokinividiwosatajenobi.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/viwinunaravon.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/952852218.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/37328ef9085d7f043c33961197fdd7a4/26866566657.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/felizawamebokopexumov.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/97469007191.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/v5it5c692qtirlcnplki98jhpr/45918154382.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/xavitusupexefenafiwixu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/fdf0a48534879484aab97880a8e9769e/rixux.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/51dec0f89934973d7cdc138460ffda79/nedotipadebir.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838c559b8ac---sejorisavubivunole.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0220774d---noduv.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5262e76073---60937291317.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/mrnuo2j0r3tqe6masokvddou4d/5677689509.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eab8e7577---64557219104.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=28g+to+tablespoonsPDF 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_off0000bd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6F 10608 bytes
SHA-256: bd45309cb0b67100f830a9da32e7ada47f0d4871112048df58cf0c130b8f1871
font_01_sfnt_off0000d5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 17720 bytes
SHA-256: 3c91ee5b830498de459a21618d2f44680ed6996edf5a264a3699cd59e56aa0c8
font_02_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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