Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a5c97d63f1fb31…

MALICIOUS

PDF

80.1 KB Created: 2021-09-02 08:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 281b671699661df53a4bc41bbcdb221b SHA-1: 56818ce3c902348a6fdde708b55d2eb45ba98f8b SHA-256: 62a5c97d63f1fb31073afb9e3def2e4c5476debda964fb314a666bad04a3511c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to numerous compromised or disposable domains, likely intended to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gikguamerica.com/userfiles/file/2888557623.pdf In PDF document text
    • http://weddingceremoniesbybev.com/clients/72651/File/31842562046.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/dbb2nlcj2afkonll8o6im5qrkv/jewazenusoxerifidozeb.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/71300024228.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/18723be42d07cac90895690e4a7965be/pedapometotobixabubogig.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/lepabiborozigoboxize.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/19405878820.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b2978b4bd8a---28953105386.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798215a615e---depevijuzonoro.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/58888411564.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/36a96b509ae6bbb50800b28473f2fc3b/finuzewalodirapafowobeba.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4l70od8rfdd0smdej1qm00lob1/pakamew.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/58364505692.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/dosizodoxetizikareganin.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/kamukuxafoverikug.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/20038950158.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f326e4b405e431c4de13b666423d2245/ronokosazexowikatudol.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/4861812953.pdfIn PDF document text
    • http://12shio5.com/contents//files/lemepexasaxajuwepetakote.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160760dad1a352---66502071128.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed1be99d74---21156810857.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//89308313249.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16082f33fed814---38358563338.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/bipudijofeduzineno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=laced+up+storePDF 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_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 17492 bytes
SHA-256: 1afd1b82bd3bc5e4d9df066b38dc83264a4baab2d71d127506a87e3aff8e71e4
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 10320 bytes
SHA-256: 48be57a878d0fd0bcdbd70236e80ea8824eb9d6314ade9813747717f2ccf5ca3
font_02_sfnt_off00011af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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