Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefd6ac3b1bbbbea…

MALICIOUS

PDF

89.5 KB Created: 2021-07-19 19:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e865435dd15d813dfc73b6168d38191e SHA-1: c4a0369659d30562e44d80217cbc87b748563a0c SHA-256: fefd6ac3b1bbbbea3d01a5716ba6e32187a586cad5ff6606591ff0e3bb3fbb9d
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 and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, and the document body was unreadable, but the presence of numerous external links strongly indicates a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.empresshasnoclothes.com/siteuploads/editorimg/file/mijiwav.pdf In PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rrfhiq0mfte0qsk419bojrvjp3/wizuwulipavilalevujenovo.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/modawebe.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/21823882836.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/brion0ov8qtl3mc06bp0eotuje/59032535254.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/lanipuxipo.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c048c22f6---temoramidizatimawojekok.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/89929ab991c0734c6f9a42bf5085a61a/29428358094.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/penukuminigiwil.pdfIn PDF document text
    • http://termocity.by/pics/files/18276428437.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/dedavigevogimexojagamu.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/31265644409.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/p6d08gf01hsdufmbo75241vqnr/tenopajoso.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/logagowad.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/3087335672.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ln4c7nfupl163sfkvbn40dlv0l/dajezawulevegonova.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/fj3iu4dbvsbgtg6aini4fjhkb6/rijojenikazobivewero.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607206adbe7d9---xijuzesiwexuwejimilime.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/91255464154.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5a72f668011ce64afafe3fc4881a56a9/gaxetazuz.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e76ef618e158d28ebdafe549eb06c862/lobasezasozovowe.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0a935cc2---62749990356.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d2520759---xofubekizibasesijigomor.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69998921769.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=adrienne+and+paul+real+housewivesPDF 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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 17356 bytes
SHA-256: 9be3c9c224e6125037cd603eb13f3e405e7523f360d445d27bc314ac5aa7921a
font_01_sfnt_off000126a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A5 10624 bytes
SHA-256: 6876a0bc7edf28e21107eceec0417735979cc2027fb816ffb05e6c4a2b9300f1
font_02_sfnt_off00013ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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