Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb201a5a8ada45f…

MALICIOUS

PDF

88.8 KB Created: 2021-09-19 13:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a4a0a9fda85fe607814f7744d4a7067b SHA-1: 951842e7be45cbe9b8be3812a7f27dbd9ae7299b SHA-256: 2eb201a5a8ada45f0909c8f52126813bd83f27de8d071058f56270ed3c973baf
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 are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=uppena+telugu+full+movie+watch+online PDF link annotation
    • https://togeltop.com/contents/files/84763597675.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/vavemuzazipefepel.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/53734242181.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/dixupufodefawesonug.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/84888718660.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/jopuw.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343a475e09---mupemobe.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/35923896391.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/kusufakotarujodazo.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/31878508293.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c4560049f891cbe05efadd4c8c248305/85526534475.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/lapolawufasaduzegupu.pdfIn PDF document text
    • http://usagimatur.com/files/others/jotot.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/redonidivaluwuwugoxinodov.pdfIn PDF document text
    • https://rakbah.healthybitespk.com/alpha/ckfinder/userfiles/files/tizenuziwesobowozewemovej.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/36339387103.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16141202e939d3---15638764465.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/19414740292.pdfIn PDF document text
    • http://hidramaco.com/files/files/mokejatoviduzigaguzen.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1dbc5ab8764c93d4e1698ee538c9f449/kufafajitimuwopifarilin.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/verobiwojomodo.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/kisowigowivuwuk.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/tulugisin.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/2369838772.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_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 17596 bytes
SHA-256: 5dd56c4d4a4ad37a62b24a69177705671abc652210c942afe2959f8086fc0658
font_01_sfnt_off00012445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12445 10916 bytes
SHA-256: e5ffffa9061c7498a2cf20e7d0125ac7dc15eff6f0779401d9ba9ec9435472a8
font_02_sfnt_off00013d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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