Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea6eaca03fdebbb…

MALICIOUS

PDF

77.9 KB Created: 2021-09-30 14:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7b1e02fb250cb3f3ead3d09a260ec9a SHA-1: 2b0e5eb8553fd7b0597a26d92716b7fbe7a70c10 SHA-256: eea6eaca03fdebbbaf573bb64a35d7e8d139ca0831d2b9499489c309ce838e07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://philabc.ru/uplcv?utm_term=zee+tamil+serial+name+list+2021 PDF link annotation
    • https://inks.bg/userfiles/file/xapuluxetitukovowalukosid.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/14265626561.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/97167594253.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/70714372909.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/402319495.pdfIn PDF document text
    • https://duvanco.be/docs/files/rufivobabesujimuzemone.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/89126239807.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6cbb47067---zujunuzonemug.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/wodelodapokifepuwiter.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/fonosiwijus.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/85089434486.pdfIn PDF document text
    • http://ilkemymm.com/image/files/pukubolakopes.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/tibumefopuk.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/36799026227.pdfIn PDF document text
    • https://wasael.com/userfiles/file/rusudimesibadel.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/vizoga.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/20638451326.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210910_AFA76FBBA8B8D657.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/n7birbb6d1l6m50bvbl9hptoi5/bupipaj.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/mapup.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613685e944bb9---44779211524.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/97122208091.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/88623586676.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/37869938350.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/35284921065.pdfIn PDF document text
    • http://logicamail.it/draft/media/zesapujaxabukogoguni.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea11586e53---zevuxeko.pdfIn PDF document text
    • 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_off0000c399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC399 19780 bytes
SHA-256: dd6f0fb08dc85170bef97542f25d5822e69b022ed6b3db18281ecc11973a8552
font_01_sfnt_off0000f7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 10404 bytes
SHA-256: 858b573fce3856ecfd6c765074aaaa7e3a43010ec2f80ea2032e5675287cdb14
font_02_sfnt_off00010f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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