Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee56a3929af8b7ed…

MALICIOUS

PDF

77.3 KB Created: 2021-09-07 02:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a03f457b8607cec9a9f8fbc54b7ad4b4 SHA-1: 6a01c8287be6b072debacb23a935426e99228f89 SHA-256: ee56a3929af8b7eda47d185704cf4ee3a757e7d612dbf900d576e177588b0faf
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://canhtoanland.com/upload/files/47847741143.pdf In PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e92b413196---23073950469.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/58184638728.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/598807ccf6aa1d574e02371823cc730f/dexoxowa.pdfIn PDF document text
    • http://iviltra.lt/images/files/gofen.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5e3516682---sekesabejotizi.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16088b87aba841---kuwakujenorudowosogijewu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/53195221401.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/wemiwunevul.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16081b5f9526be---galopepimij.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/56371333385.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5366e691f9---paxifas.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/49236960130.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5f697bc0d23ed9726a5c62bd9b37d8a/19326200947.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a14207d70be---lobigepanulunefutidepere.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/jeposetaxanezitefofuba.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/90201843165.pdfIn PDF document text
    • http://446888.top/userfiles/file/relevazakanixen.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210901_9B021E74E1C46FCB.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dolilabatefo.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/6u200fu5gbtv2224ik030t2b84/fuzavepapilenexu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85c23a19d4---8563878016.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/2748130f220019dc39f23c80c229d505/58954750115.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/39393467175.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/25228252678.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf112b1bf---vorazomimekakegemijat.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/86484549711.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9fb33b913---fuwasinobinur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=labio+leporino+y+paladar+hendido+pdf+scieloPDF 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_off0000c648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC648 10832 bytes
SHA-256: 92734e9d8e32954f5be8d9fd58feca743e41e1e1f51d7db9cd921ab900545313
font_01_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 18556 bytes
SHA-256: 2779bc541c69890761b918a8189fd59070e31dc6cbf7d820f823560e3487f2e5