Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c20af0d5c968e4…

MALICIOUS

PDF

84.3 KB Created: 2021-06-25 13:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bf89d01a9e5b25b29082943b1d7ed8e8 SHA-1: 7b83b116820245d2b21191123b0c789091244973 SHA-256: 46c20af0d5c968e40327d963637c9a96855d9b5ef9f847386b74202dc53a28c3
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 it functions as a link farm. The embedded URLs are likely intended to redirect users to phishing sites or download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f00933209cf2bd90aa761cbef2905e67/34091040770.pdf In PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/37329060008.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/pagajatamotidumuweku.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5616a41ede9c6bd2297fb3bae5137208/zopevizige.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b873e732504---dotepemuk.pdfIn PDF document text
    • http://rld-carbon.ru/file/gadatidisozaxovopexagewi.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/a5mg5tkmn8f9gio8epq8uhlb2d/begolifosenemafazer.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f48bca25fb---83034859408.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7dd522c13---75835735467.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ios3tj8nemeumtjiedib8ru7hj/bozodiwuvoxome.pdfIn PDF document text
    • http://artospace.com/pics/file/73027725283.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/67853518852.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd092362f---83152524111.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/guvumulupaligajuwofavuz.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/90137183272.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a199917d974---bolutezosovoxav.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/fbabdbc314e977a9b853afffcdf98b77/12973697288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=what+does+unit+fraction+mean+in+mathPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6E 16392 bytes
SHA-256: 439f91fc52918ec11de7c10fc66f42d556e3ca0baf24f0cec7590a9fe4e8f18d
font_01_sfnt_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 10788 bytes
SHA-256: 3ff89df34bc3d9dd8d8fd0e2660a7a3ed1e689667aede567fbb42041218a78a6
font_02_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 18812 bytes
SHA-256: 6fb39020e9f9f524a4b684fbe67e50ee65bc25017645f326fffdcaed4e03df37
font_03_sfnt_off00012bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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