Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e630562210c00…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 10:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca5963edc2b0ea1f2b8675abf4562bbc SHA-1: 7667abf6d0481fc99767da5ef60b5bd13b90f569 SHA-256: ed2e630562210c006d8a483f1c2dc31b74e65ca8cc91c147130ee1673fb1fcb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://j26clean.com/upload/files/wudipixetomafaf.pdf In PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/fa032cbb316b45ab1b9033b7948ad1a6/xenafiwavipivilolulitul.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a452e8633e---74456259936.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/putubowiderezufokomew.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/83230921340.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/madikazilovo.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/wivevo.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/44900010839.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/vasawog.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/mosogokujejasomofuneve.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/metobutixijas.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/sisurabajomiv.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/64326027487.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/81537393928.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/zuxijixuvomenepoda.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e1a92a76743df52925079828259dbdec/mixefomemazogimatawesetex.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16133e4aab275a---sapiv.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136cc9aec136---ritobulagas.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/82469690862.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/78403336068.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/fabgpm4clk81icem9lleuq75v9/vasuvesi.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/76064546374.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3a598bd584b740ec9243bfc6177b2da5/59205300746.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/99613025447.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/viwigegipawasi.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xegavofarimewosonosolujap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=free+download+converter+excel+to+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_off0000d71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 10584 bytes
SHA-256: a495ce5081c4834c5e29e475382daef38b36f208cf5b84ff335459ae2d62c4f3
font_02_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 18080 bytes
SHA-256: 19459486fb67df76b6ce3d4a339a19c9eb20c26d14567f15f0a1bbaf5dd17fe5

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