Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eea899604f82217…

MALICIOUS

PDF

71.4 KB Created: 2021-10-08 12:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2945afd04c78f4e58b0449eda73552d9 SHA-1: 3cd2ebb5c51c7ea336d0e84e9291eb4eae1238a2 SHA-256: 9eea899604f82217564e0dcdcc86a7fef6a18a7044df91f019c09fa1fc9fedb5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. It contains embedded JavaScript, which is a common technique for executing malicious actions within PDFs. The PDF also features a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files or redirect users to phishing pages. The presence of both embedded JavaScript and a link farm indicates a multi-faceted malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414d0b5b00c---75323832369.pdf In PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/34291227332.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/dijazidenavidakuduzowe.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/18953355133.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/lakavopi.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/87139667484.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/dunebodoxakunafomu.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161340a9fe78af---pibotafimi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149513080970---zegijokutalilabixajamogas.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/65789168152.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e39f28d851---2530044256.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ca9dafda1294343e3f4d1acb4f6da43/kavaxavapivupixija.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/64811236185.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d84619cd---vumegawilodarudanezokava.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615c51755dc43---zikepinagukexuxilibis.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/30806711638.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/67226174600.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/28168376762.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/fewovifedugaxiri.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ec0f31c2b06f9f4710862b3d95cd1ce8/16454156621.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210917_9A2772DA3874F235.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/77428860138.pdfIn PDF document text
    • https://kluchar.net/klucharnet/images/file/35476209321.pdfIn PDF document text
    • https://songhongresort.com/img/files/lewiwusanitowifiwox.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/wazilawipetorovonoz.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/gilomid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=travelling+to+curacaoPDF 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_off0000b6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F5 10364 bytes
SHA-256: d75db5525d3d86a08326932e3baf7e42f8c8982b27164d7799e0756b61c6a2c9
font_01_sfnt_off0000ce7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7F 16564 bytes
SHA-256: 5e31be3607bbf2fb8247a31e6f089548be738e8d900528ada0c5d985fa049aab
font_02_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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