Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b20a2cb13e186b…

MALICIOUS

PDF

117.0 KB Created: 2021-07-02 12:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c19836bbb9b91a88c15233244444de65 SHA-1: f824ddca7256d27c576fbc1f056502049ea00eb6 SHA-256: e5b20a2cb13e186b83ffb8b8eb2329f89144d8d10f94a310d9ad50c52a286b86
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, reinforcing the malicious intent. While no scripts were extracted, the presence of multiple malicious URLs and the nature of the heuristics strongly suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5abf8ac34---88246103242.pdf In PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160941795a90df---86618235334.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/xepaketugud.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/xafinivonibara.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/vemigodokavodufojij.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/s0g46274333imp6l7i3erdgom6/motavidazomarajajowowux.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/5625e6d4700dc7674cced8e6d93b0c32/vedogufexajufozelokuzom.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ad4fd001670cce9f112b5663e86ce52a/nejubefifakixajo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/693a79884f24b7f6190bbb5f8a51ae05/14335586887.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/busezakevibediregunak.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5101d5bc---xipiretimivowopuvuja.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/8kdm5hnnm4l4gf6q56e6belhdi/jesufimunufifokos.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/u5079oieajnv7t43hv0fhhaqse/nolapijuwib.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160949d9190b98---17987502290.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4f38a2506---megepavolawenaxugaluga.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/90271976783.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/fodinenerebedewiramisok.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/rigibesulege.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b3fb1d2b979e46c821f0e13b52081e96/74050699349.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e61ab409f9---tekatelavug.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/wusutabafigatijafoxebex.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/b9tffgt4ionc4spohgekefvmi8/85600769284.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c4526ecdae9635a1579e08994dee333f/mewejiridekob.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c835b937cbb62a0ff510be0ac963ee8e/roxagujukadevorigam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=guild+wars+2+chef+leveling+guidePDF 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_off0001672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1672B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F42 10948 bytes
SHA-256: 16842f0950bf2270cc6cf801c93442816dc4c436706c0b2f0149c870d396ebda
font_02_sfnt_off00019875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19875 17708 bytes
SHA-256: bb11e238594c79ccb1b411f835ad7d450cfcf7c00c8a225694fc51e283c053c9

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