Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c984628b5354a3…

MALICIOUS

PDF

90.2 KB Created: 2021-06-21 19:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2d81f4cece37365f73d587350b8cc412 SHA-1: 9c5c5206ac481a89ba8af89a7af43f203f041d27 SHA-256: d2c984628b5354a36611a454f5def8f6a11038d595f08d55b457445802c3f580
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wsbtitan.com/images/file/gokizutijetegiwi.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160766892965b6---17966207296.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/30c8f0e9ae36a348db6b09359df1194b/denemetevenolo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f073349040---70850332204.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/jeletutunogurulorifigor.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b91e3035e73f1d85fc8ccb0a5a427fa1/77316335889.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/9kom12tdpic8bbhmovin1k7afp/jufukanuzixamijo.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/32814998023.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/29726a4b784e12de267ce2f881fba066/tiloxavusewisopalak.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/06be1m0jgf2n9pmfeas698j0ii/xajefadenubireribavomul.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/neloxezozinedovipobesubad.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/29bfb2f142608bcc45cd9429047a14f5/femoveza.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0216cd364---rejizufepesep.pdfIn PDF document text
    • http://allycatering.com/userfiles/fukinunubamavixubewezavi.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/dfbb317ae2902e8c241e865be6de00f0/76037807998.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/ralavejaragobuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nicomachean+ethics+joe+sachs+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001166e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166E 5312 bytes
SHA-256: 5453ba347619932b82f7fc19d2162dfd48f3ba644c2263b9bf16e1788da7e51f
font_01_sfnt_off00012866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 18940 bytes
SHA-256: f868f18a614ca9bb4629cef92831eef8abc011a3ee36bfbf231034c2ac7d396e