Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db2e2ab50423fcc…

MALICIOUS

PDF

76.7 KB Created: 2021-09-01 06:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3f20e94602b3bd2dfbb076f4df22aeb9 SHA-1: e75e9f7ef5a53eb20fcd6e074a24e1c004f3ab2c SHA-256: 6db2e2ab50423fccb1c3ffc8a197e0797ed5a3777344fab4f9a623a5feaf03b9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests exploitation of PDF vulnerabilities or social engineering to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/5k48vhkpotgkg9mirs46bpc4r7/17429065968.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/caaea73e5d6ec514332de83de013b508/jakuba.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/73079176886.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/60b0e1c8594a2db0d44c5b9e621deeea/moxewakos.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/10578f7d23dfa7095e2dc8f3e24e985d/fevopoxi.pdfIn PDF document text
    • http://apvn.info/userfiles/file/sumanenugumitemuxuzemadit.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/95bb287d12d6179f40e170e5600eb443/soxigitakonow.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/karozetugem.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/vofipujo.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/kenaperisesijewenefa.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607538008e626---lusobujagugo.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/kavixegaxujubaniv.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/6264614131.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8809719b28---datinepibarore.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/salaravu.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fe51b53a357ad2d3ce7579e2b305c836/golubezovas.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/92011745470.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b2nard9e9vqb4gi8kqre3m05a3/69280314162.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/11347311722.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff54070c4---solixokovipedilo.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/gorabu.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/mowumamulimaburiwujikaref.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/26791584880.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f025566ab0---4425338463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=area+of+circle+is+equal+toPDF 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_off0000c7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10452 bytes
SHA-256: b4565b74aca9193bff5ff5e955a8fcc482e0bc6e96359b823322ce5745f51ba9
font_02_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 17160 bytes
SHA-256: 14d92fc565179faf339d77fd3a43c606c6478936ea99e52b422e16423be7c716

Open this report in the interactive analyzer, or submit your own file for analysis.