Malicious PDF — malware analysis report

Static analysis result for SHA-256 296e0af3887de89d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 10:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba16fc06445c7e74754854bdc9a9a445 SHA-1: 2a13b3791d696a925a744e70e820d0b59bec011f SHA-256: 296e0af3887de89d3c9a0a51abc486f5ef6bd859173ec05423306d90442d00f9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites 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 delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://lorichphoto.com/pictures/file/zaxex.pdf In PDF document text
    • https://kodcomputers.ro/2664/uploads/fumuvesisetizivofu.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dca1edacf1f---remapik.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60E69E89EF8CE.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/abdcf3bc81c40064f5b86b8c3b5ee27d/gifiberutasa.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/lusazakepog.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9dd3dfd39---82471991933.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/38658329733.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/xegatadevezozaludobu.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/467090059.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/dea264696dac50dbd055cee99b862618/xezamiropedimafitikamepoz.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/83371542924.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/62849504349.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fa64e5cc47d---62831315083.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/felojinezojaxopigexi.pdfIn PDF document text
    • http://ustunongel.com/image/files/42650500162.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/nogobozam.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/32973279286.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080464892d85---lukad.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/kotoribudi.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/xokiroluriwikuf.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611c4dc9e0943---kewulufamalexi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/bjjr2h28a23rk3413k3tvrh114/kilodomefufel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=gurps+cyberpunk+espa%C3%B1ol+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://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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 11112 bytes
SHA-256: 5367d95bdb7e23536e687cd334e4e6461f949c69554b305c5dc965d86e52873c
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 17828 bytes
SHA-256: c589f028d676506c11722080e323187d736c245d43329c4d1709daf9931cc196
font_02_sfnt_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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