Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09e69d6ae44b93c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-24 11:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01b3c064a1f64f1eff3cf79b703828bf SHA-1: ef63d80adddd058e18a410909cc9bdede62dd945 SHA-256: e09e69d6ae44b93c337fd5dc06b5081ff2b501bb0ba6cef86f6aa1db338c423b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with the 'Spearphishing Attachment' and 'Exploitation for Client Execution' MITRE ATT&CK techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=euphoria+ep+1 PDF link annotation
    • http://svaz-podnikani.cz/files/file/mupoxen.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/41021125068.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614983113227e---88897372376.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/eee3a1267b554ff3f08d6f1065a84b64/rodavakaramususodewes.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/25379936060.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143893e92830---14240834264.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/rotitavarumavipexow.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/41065208698.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16310531696101.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613156333ae74---47753894172.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/33896618611.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/99281631545.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/nazexik.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d821974aca---wivizewaje.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/wumufuxivokowexe.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/48703050092.pdfIn PDF document text
    • http://sireny.net/share/files/45297668481.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/rexigej.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/vanibatisunasabiluzizi.pdfIn PDF document text
    • https://mcsfood.com/images/file/4606830573.pdfIn PDF document text
    • http://biosite.ru/images/news/file/kazuku.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_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 18176 bytes
SHA-256: 7a033bdb890b8b1aadac82ec8bac621dd693ba0170f2d7005764a661aec4a3dc
font_01_sfnt_off00010ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 10068 bytes
SHA-256: a67af0493b2aee3178c76d6e1030457d472d099612a9f8ff5e1122632bfb41dc