Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee519b1198d8d088…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 00:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 072623249aa8e9703fd3bafde08de27b SHA-1: d1f9fded739f83bafd205f9886d2d48f5dfabb39 SHA-256: ee519b1198d8d088767aa7ffaca32ac4b9781fd021affdd8c0e85aff36131af2
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. The presence of external URI heuristics and link farm indicators confirms the document's primary function is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://beautybybelief.com/admin/images/file/fulisudajixenerakerewe.pdf In PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/13418914594.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0gvrshlusrk48fm88s1c81h5u4/xunozapiru.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/gazafebobuxofisezevev.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612faadde1937---fuladorige.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/98312763838.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132d19c518ff---vurumokaruxuwifuwulunot.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/lazot.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/6104713902.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109202358298250.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/98429299797.pdfIn PDF document text
    • https://slide-bearing.com/d/files/71665171284.pdfIn PDF document text
    • http://jinyezi.cn/upload/degegevokata.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/38335316649.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/nonukirarorora.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd5dde7899---88095785779.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/7111548463.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/13700934801.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/86269862427.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/88400786083.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/fokebigisuvevudidufufefi.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/17594833590.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/53f9a36b1fb2cf547b91b878b9b5aa4e/42891022001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pokemon+moon+black+2+rom+downloadPDF 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_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 19168 bytes
SHA-256: f597b1ea8541a15f05bdba44de355e05f981ffe0968c03e18f3e636b35e810de
font_02_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 10612 bytes
SHA-256: 717d2828f8fcc735bac0d7c2d6da837b9e3f0fd60a242021368823ced17f5467

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