Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac98fa1eacda890…

MALICIOUS

PDF

108.7 KB Created: 2021-07-02 22:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 39a953aed6d77b43eb0fa7ab0fd45572 SHA-1: 1870b0b83c0ac8f82b193367003f9af5b03fcda6 SHA-256: eac98fa1eacda89038f30c0202c9e8be2eace770d6403a887458c3e78d6dd405
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external URIs and link farm patterns, indicating a likely phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the structure and URL patterns are indicative of a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 https://cructi.ru/uplcv?utm_term=verilog+lecture+notes PDF link annotation
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849eaed7dd4---22103211693.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/tasidupapibede.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/rb6216fhat8dda1pek0nndcc7h/79610877815.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edc91a4da---mexavesejosavonakaki.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35520ebc9---44322249963.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cf8acc596---49930570615.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e498e47edf---sapivaxovelin.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160895021382c9---fufug.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23b2bac0e2---zoganobesepemufujekaza.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3370eabdaf6f1bc1997a28e873721fa4/46466106900.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/tvv8ptslcf685uqca60n086u56/somisokik.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e92e60c720---mupadotuwujeraxa.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/91cd0cfe507e056570e974cfbbac7683/32787960895.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/23198897101.pdfIn PDF document text
    • http://strandedtattoo.net/file/vizibemuzegofezup.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf20e54c28---94742349579.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/82084008538.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/zemudufevuvobexoduluni.pdfIn PDF document text
    • https://egca.fr/userfiles/file/dimexugiguvubewitinesuj.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/50541594801.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/2834b28554fb946c2beb1e5de4a17491/2998008161.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e159a89efec7579e69e53953383b0aa7/45811745648.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_off00014478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14478 18652 bytes
SHA-256: 5a9fdcad1ce0f68ebeba74b5ca2b48f4bbfb6ab9d85e0cc6e6e757da1eb1e146
font_01_sfnt_off00017685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E9C 10312 bytes
SHA-256: ad4887ecd7c1c93208ffbc6b4edfe30bcacee8733b0c84f3a4f10a5ba1874fd1

Open this report in the interactive analyzer, or submit your own file for analysis.