Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14096b6503fde9a…

MALICIOUS

PDF

117.3 KB Created: 2021-06-30 02:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d2d5a49b89b2667a8a6c911d5171016d SHA-1: 807ea2130f38f615471afc35f44f2c24a8079334 SHA-256: e14096b6503fde9a2f1492994efa42f7c1c4a5bd52ae8912f1b9682fe771b010
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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 http://acpiindia.com/userfiles/file/kalatodufipekapilezupe.pdf In PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dc12cb3d7---91590212720.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3e078bc0---71342547366.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/nuvibabegudekuma.pdfIn PDF document text
    • http://anpo.vn/upload/files/96714840200.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac83d971cf2---87696611899.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a6312365e2e---9589910644.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16079870e94da8---zulegikufogoverixirujapo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f7951090---dizafoxoxilibefajox.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5eb2c30e3---tupizenojiloxajatukewa.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/524d39a38a4e749f5ac0bcb219d6c767/81632872949.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/nasefi.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/gozisufipovazarupuwuniwuv.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9f792f011---66675758381.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/21405769732.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6e43ea2c---9739818931.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d725aa1d73---40216162445.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/88887445624.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1926a24828dfb6fc30e8aa9956c6a15a/jipitinikeniru.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/mv5jdcj4k91fh69095j22afgrt/59624933258.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/lenufebikoxe.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/7818293487.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/57170080400.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/toxuxijiradaxatajewor.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083510f220bf---joreluw.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/tipusoxasimezaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=intimacy+in+a+sentencePDF 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_off00016956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16956 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001816d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1816D 10192 bytes
SHA-256: 8b8748f58d796a648769b72f7a39a3be9722e547f4b673ce1234e8aaebc449ee
font_02_sfnt_off00019843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19843 18384 bytes
SHA-256: 58a2cc9d584d452cb2279d0e23ca4d1bec58dc4853bc241874d6db0ddab446fe