Malicious PDF — malware analysis report

Static analysis result for SHA-256 450321dc36287e9d…

MALICIOUS

PDF

172.4 KB Created: 2021-06-12 09:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eebad5cc681fd4264f2f08c3a18130ea SHA-1: c83a9053da92de056ae066debff636d6a2f10b66 SHA-256: 450321dc36287e9dfa66d7996732cbbb36e09d126c6f937203d0beb032b79056
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to various compromised websites, including those hosted on WordPress upload directories. The document body, though heavily obfuscated, appears to be a lure related to 'Edmund Burke conservatism pdf', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/uplcv?utm_term=edmund+burke+conservatism+pdf PDF link annotation
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b19980246999313583fe1303da1b3283/68479190449.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0nmhr5lfc1kpfc81dm3j9t5hvl/zakexasixadu.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5102180d6---49531402096.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//72328159222.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/181q8jej952dhfjt4j1l0q13r0/7218479648.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a88dbfb3a9f61b62fdb048647d187eda/vidonidusidetip.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/96617346221.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47f8fd587f---68143809154.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/31379070497.pdfIn PDF document text
    • http://azizolace.cz/images/file/kuxupifamotamatel.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/terul.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/tenodegirulokofox.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077e79590cdf---jutaxulekirovilika.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c328b0772a---65856935255.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2879091e6---kexitudimani.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/68693145654.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609894b6c8db5---moxexowoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000267fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267FD 5488 bytes
SHA-256: 45bc776757b80044e61aa5d8fe0394839563dc0cf22c53c0860a0a5bc5573419
font_01_sfnt_off00027a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A9C 13812 bytes
SHA-256: a76b691abd2e95e84ce8ce09c08094730feb80fa235f616c59769acdea2e0e22