Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9eb080735ccb1f…

MALICIOUS

PDF

108.4 KB Created: 2021-06-25 16:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 790d357bebb93d00f573f16608284f3a SHA-1: 838ea97e71ae7fd9f9311286e20c4050b08cd20c SHA-256: dd9eb080735ccb1f69acaaf56e8975b0dea58fd4712895702d58facc96ea53e7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised CMS uploads, with numerous distinct hosts and UTM parameters suggesting a phishing or redirection scheme. The PDF document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure and URL patterns strongly suggest it's designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2f66d15909804adbbaae9423402727cc/74027343564.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/8dc2e8a39eea5342f58e810fbc7d8af8/vexajube.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a460ff2a800---28858392505.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ruqisi8nsmgt7jdmet1vpm48n0/80774473449.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079c5478d230---zomokarifodojozu.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/gujusevakawewarabivaku.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/surazawenula.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/89717756309.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a848295dc5a---sidipama.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/38743883155.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb090a29af---vofuravitarumu.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/zolelozizegoxidosi.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/7voi2aeq1mg5oclqls2ueldri3/gotuze.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/motopatepibutomefukuz.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a53d6e20c4---wisogo.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1ekgbmtldaflbh9927fjb7b1s5/fipubuxiz.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897e45009f5---6277814929.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/91083202692.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/46030955760.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dot+structure+of+mgcl2PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EE 19292 bytes
SHA-256: 90dae7ac7ac7f12d28488e176f0e9564720053bd857c6a5b22d71a2123c376a8
font_01_sfnt_off00016934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16934 2504 bytes
SHA-256: 7ad6a22679577e57022e2c044cbfb65c37f87ed5ed8674e20ff13b0b7f3c62c1
font_02_sfnt_off00017421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17421 10540 bytes
SHA-256: 305ed0e742fffab5fdee6599ebde5545e065871e6d7b0333c592e94bd3c5f8fb
font_03_sfnt_off00018c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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