Malicious PDF — malware analysis report

Static analysis result for SHA-256 3617c4c34fb798a0…

MALICIOUS

PDF

97.4 KB Created: 2021-06-30 22:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3050c0970467a55b33afc4c998f7c6f2 SHA-1: 0043ad16fe63d418d3a71edc6e83420e14116cfb SHA-256: 3617c4c34fb798a06a6721809e5bc65a09a0d61eb61aadd4c7c555beb4d6b52d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/177251005460a4695d59f79.pdf In PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a5bee6813---13720791011.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607aac432be27---ziwefujunivudoxubiwozu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r83de879dlia4p9nmj3htopn0c/10640151192.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/55375361326.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/rixewij.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/b256d1be473dfcff0211143cea0dd2fb/minevelaniwirinubaxudo.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/94298078230.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e8380025a---43222900781.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/84605559363.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5210a298a7---19335880967.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2601eabec684c52eec21f377fd75b146/66691065670.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/40633810549.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c7b360a36fe506aec64e57eeb70ff0af/bidubuvodaxaluxanu.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160797ee6018cf---51614691504.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160970b16bd11c---72996915698.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/rumuxobidubufidejikid.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c625dda7068---vifomamebikasabuzu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf1aa605ee---nabamolo.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/1397847454.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/29bbe02e238f13c6f334b273e6cfd835/wowos.pdfIn PDF document text
    • http://www.infos-lentilles-de-contact.com/images-sites/files/7413119702.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/085ddcce744864817a67a02ebb36c12f/jimuxovelunim.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/23679703768.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/40513493475.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/40724354255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ulnar+styloid+attachmentPDF 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_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 17768 bytes
SHA-256: af7460c3ed13cfc92bdb5bcbe69644a35459f0013c408c3d8fc7b90486405477
font_01_sfnt_off0001475b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475B 10756 bytes
SHA-256: 43252b3b27269e6e90b9de6742c249c5e6e78778ef1dca00c7bd4adc6fa554c6
font_02_sfnt_off00015feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1