Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dff076297d27e9…

MALICIOUS

PDF

221.2 KB Created: 2021-05-28 22:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8667e8eb4a655f6c2cb05c37e2b46aec SHA-1: cab5add0c3e7168f4cb6e0c9b435cda6a8ebe65e SHA-256: 13dff076297d27e92cc23cf3c553d5794859833e4862e718304a9758a0ace7ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains external URIs pointing to compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of compromised CMS upload links and external URIs suggests the document is designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=cu%25C3%25A1l+es+la+incubaci%25C3%25B3n+y+el+ambiente+del+p%25C3%25A1jaro+cuclillo PDF link annotation
    • http://adamlegal.com/userfiles/file/mekubifidipomobimep.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a125473b413---maridabone.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec4b9eed63---14014318881.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d88f4f0a0---35143331794.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/demosepuvemejuxawod.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/563425330c83a5bd33548d0bac279310/mavomuru.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1773605dc---64318484367.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/lavoresigakivusutakozimi.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e1de798f813b4f3aef84cbe07b57c032/vakagimujebujadetuwugika.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1f72cc8d---mabejoruzuribov.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/f36qfdb0pno2kp0fjbhoaqvjr6/tugikakitadixo.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/tijuzavidifusel.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/jopavakimugopanomer.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/fisum.pdfIn PDF document text
    • https://latework.cz/soubory/70798145202.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a715ecd2f8b---dewuminisadegozetasesejo.pdfIn PDF document text
    • https://mmszke.hu/files/file/wubomefopexikululaxefowib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000328be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328BE 5812 bytes
SHA-256: ca38406f999484f502773963362c82d65a87151719bc856dd9f6b9bb30da8efa
font_01_sfnt_off00033b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B95 12640 bytes
SHA-256: 7ec7a3a7281fe93c7c01375902983eb6fdca61fc647a5c64851c7cf947d7b914

Open this report in the interactive analyzer, or submit your own file for analysis.