Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2993a8c87fe6a9a…

MALICIOUS

PDF

84.4 KB Created: 2021-06-25 12:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8a031d773244e920dda1bc4be1989d66 SHA-1: 889bf4946da8549c04ba2906a3f7a557dcb9c455 SHA-256: b2993a8c87fe6a9a493cfea355d1a249f9d252adb59e7f9826c4e363395e5267
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The presence of multiple links and the nature of the hosting suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/uplcv?utm_term=cambridge+preparation+for+the+toefl+test+3rd+edition+pdf PDF link annotation
    • https://alatheir.com/atheirwsfiles/file/wofajugobagojubonubize.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071557930710---44857252816.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e72e8ab8---42658741472.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/128bcdd0f8f7ad3d47edd262ea41ffe9/badedevesetudixotewen.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/15107262025.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/mipita.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/gejigag.pdfIn PDF document text
    • https://artbynela.com/uploads/file/19634381962.pdfIn PDF document text
    • https://peterdegendt.be/file/46929872354.pdfIn PDF document text
    • https://bamor.org/userfiles/file/webexovobobunez.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/35aedd7eabc071d536654f99fd72fc04/josola.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/44739055448.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a28f87dcb1f---dibemisamuboxaluwogibote.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/b3siqqmp7tmmkevabv4h82a8n9/69125938081.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/mebodipadudibedolalilu.pdfIn PDF document text
    • 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_off0000e1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D8 18292 bytes
SHA-256: 41e84949a1ea8cb08275cdcd2973697918231f54145f73e2479c929f659d71bd
font_01_sfnt_off0001108a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 11288 bytes
SHA-256: 2d142f0817745a2cfc78c9420f3b4a9dc7eae83a3f6a07498143d642aea7bd4c

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