Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85f5c84849ebfd2…

MALICIOUS

PDF

107.5 KB Created: 2021-07-15 11:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2f203f876c38df28647d8ffb1b082e45 SHA-1: b9ada545b06cb79f3e7695c054f81c85220873ae SHA-256: b85f5c84849ebfd2ab2ddf3b12407ca95f1a3128b6ffbcb3c191aa6eafb7fede
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16083cdb022545---32467533862.pdf In PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/pezarokixi.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13637384850.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/36174290928.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/zakovixenawupamabexub.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a82c1490a89---jumuxokodanebokuxij.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/54044065514.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/noniforepumabatuk.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0773796001624668225.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/19786117838.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/hdt6popq8qpjv8vdn7d5toslg4/76128313444.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2023244f4c---70902686208.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/ee60ebd2135a31d756a115bdd9539cbd/wobivesejoko.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25e2577791---30882978412.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/8mrpgr6l9qbu4l67iotkqnh2vd/gewisovopu.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/592458328ea91cc6518dd57c0f057fa1/80069742486.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/735763adf25a23962b4f99faaf7b7ebf/85256262845.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/84553141257.pdfIn PDF document text
    • http://aps-mes.com/files/file/jedivagojedokakukum.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba90e5bbd85---vijewodibuwulukatenoj.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd2aaa95de---48421382154.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/ruzorasazedusosup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=game+of+thrones+4+book+pdfPDF 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_off00014093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14093 17948 bytes
SHA-256: d0942e07a2528f308732903c5f2d9915e0fc4620032fd36c5f89d714070cc78a
font_01_sfnt_off00016fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB4 10976 bytes
SHA-256: 92fa53135ad90dcbc23b504309a849909714461f3beb34622353975278b43ddd
font_02_sfnt_off000188d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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