Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d959d6390736bb9…

MALICIOUS

PDF

72.2 KB Created: 2021-06-26 00:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c34cc6f6e71a211b6657a3c9b88cba29 SHA-1: 2995014a8e2a46a676370c233f63c3e471214a87 SHA-256: 8d959d6390736bb9d637463c490ba60ce02d41e57494887b615c60bea563863f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://dataction.org/demo/dataction/media/nopegufum.pdf In PDF document text
    • http://accronline.com/userfiles/file/87956262620.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/80970679815.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zokitelidubirujatuxitexo.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2c5dd3297---34487407031.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85a8ba2da---suxuxerukuz.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/buxabezukijepovuxunapiw.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/barusivuxamafifidigijijej.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/wugirikukewepe.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/63599642811.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/54814334121.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/s8jih3fnjnkp8l0gvrnr6dhmia/vadaxibadekugalofed.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079576c063ed---13480319402.pdfIn PDF document text
    • http://biosite.ru/images/news/file/lelazej.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/bff9f4608d94f3a422895c1e36c70bf4/regegapo.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/7s572a8ohcpekln469ejp6f4g3/2753633076.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/kakimomajafaxusoraj.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d782294669ac04d99cee97c616bea54e/85822296511.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073260cf2850---98232726386.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc6240d5a5---zavapukeluzediwofegurodex.pdfIn PDF document text
    • https://actor-conseil.com/files/file/64869968271.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b83c4aa7---89091116658.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/318dc63a536f04ee289df44594eabec0/vitunerene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=safety+management+manual+doc+9859PDF 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_off0000b9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E7 11256 bytes
SHA-256: d0f7c07395273b3ac0061fcfcbf96308012cf009ea4e420123ca2827d6aa3159
font_01_sfnt_off0000d437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 15324 bytes
SHA-256: 7805353a37f1ff888a74e927f26131dabea69c21cbb3355a30f01ebada105167
font_02_sfnt_off0000fb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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