Malicious PDF — malware analysis report

Static analysis result for SHA-256 b760c4bcf70b8e09…

MALICIOUS

PDF

109.7 KB Created: 2021-06-30 11:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1093209758c65ba3b62e5dc0da308f17 SHA-1: e04d622a76604eab25694aa38b782d0385a50730 SHA-256: b760c4bcf70b8e092538a849fffa6f2105c822c81f2420e6526bfb73dcea6445
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains a phishing or malware distribution payload. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting sites. These links are likely intended to redirect users to malicious content or download further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://irlanc.ru/uplcv?utm_term=the+suite+life+of+zack+and+cody+nurse+zack PDF link annotation
    • https://binarbaidfabrication.com/public_html/userfiles/file/gilogiraterowawebizitiseg.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/ae60666fe2442fe9715e89b8fa94e0da/mibukejav.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/59098999369.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sopanovowawiraxitelaxa.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/45693277459.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160995fc931666---5634531252.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26cdd24d24---42003248423.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wixupupoke.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/wulenixubi.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0e5bde722f86e014838221568cd9a942/12853397882.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16243654760574.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e86bea6b---zemozuxifuwizexesanev.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/53180261354.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c1a68a6383d884ebaec96de4e342ef06/wijisimawo.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/pafesugamadanukagupot.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/h64gtlm4bgf83gtsi6u72eejrv/96230860695.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/14al8mhqhmde1kd4cjtd9gofm0/xevajopowowimawe.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607291c3f2383---zogokuxame.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zituruwovejujivabuvul.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/zikunixefuw.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/7h2qijlq4m70r6r1iafi3b03bd/fawogijatibur.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bc87f38cec7---mofovapu.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b13a8e6bebe4b5643a9598af5faf015/fulegage.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd6300c59---pabefegobu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E3 20288 bytes
SHA-256: 601b4b928e007ddd4127dcfa871a8f253e3313e5208c868e08a65300e86f6448
font_01_sfnt_off0001470f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470F 18320 bytes
SHA-256: c96fcebd04520678d75cb9232ae371786b58b8c5c2ecfb3e748c6105d616c54a
font_02_sfnt_off00017758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F6F 10904 bytes
SHA-256: 28c4e6529900d9584b8d88643bf6b8dfb03a0dfea190ee2c796ce818faa79c9c

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