Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed21e08e49287c1…

MALICIOUS

PDF

85.6 KB Created: 2021-06-28 23:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0e20acf3e7bc83c1939ddc78b4ed5b98 SHA-1: 81508863cece43d5ecce50a7dea2278e63bf6833 SHA-256: 2ed21e08e49287c1820947f8a679afeed3c54f9afbb4d841d976e68ffc17633e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous links points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=overwatch+year+of+the+rooster PDF link annotation
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e748d9860f5233b947890b8b60a60e18/48865548077.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/14472363006.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d834d216d---vuluravepegom.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7837907f9---bagavofuseko.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/87928380968.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/nopivotofov.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/futafoxetiba.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160929a4d58142---31181861474.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88311c2a4b---fubowezopebepebawi.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c91e8cd7080f41dd53b3af2ed5cb3a73/wepozazubawefajusuduximi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d40dfb20---2467492043.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608955134f582---bakuwofepokoxoduxavazazuk.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/mipijegaguv.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/nedelogaxegawokukibi.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4555a69674c70fc6f47cd450bc241b20/loxulefijas.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8dccba5fd---duxojawoxogi.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/85fc520c5d466e058d2f0abcfdb80181/10945007426.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e876c76953---fuxevugojixalibutunilo.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/20662546260.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/bunixul.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/s2hqallcm75nsh2g7925bfkv34/jovunonojaja.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/11137755848.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c687e643fe0---bavel.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_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 17456 bytes
SHA-256: d29681c1d4a188c99af8220c50470583ea4f01234bf1f2529c08c18b6480b678
font_02_sfnt_off00012fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 10480 bytes
SHA-256: f6caa8972af2f957d40ce9570483765639d4e8084a84ba15a688a672ab9ff11c

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