Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fff52569a835aa…

MALICIOUS

PDF

76.2 KB Created: 2021-04-11 18:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e785d62635a44fcb55ddaf03e9b4758a SHA-1: dabb59560597786d3830299d714205afec3ae4bc SHA-256: 94fff52569a835aa3bcf37082b2fde21c38d2c1a4ef24a05025b78d36998d408
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The primary URL, 'https://resalured.ru/strik?utm_term=architectural+working+drawing+book+pdf', suggests a lure related to architectural drawings. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=architectural+working+drawing+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470830/normal_5fd8d8a2633e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476007/normal_5ff03f3a85681.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/les_limites_des_institutions_de_bretton_woods.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_6052847eedc05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fc6b92d09d0e.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/comma_splice_run_on_fragment_quiz.pdfIn PDF document text
    • http://masimepipet.22web.org/mejuzakodolezezatut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retelowanudugut.epizy.com/rsv_catholic_bible.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_186b9b77449446d89ef2ba31bbcd90b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31de035c-fdf9-40c4-9af4-4c9c8802e496/25212982907.pdfIn PDF document text
    • http://sesugemedolaf.rf.gd/land_sale_agreement_format_in_english.pdfIn PDF document text
    • http://mogerokefo.epizy.com/72624082645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff4377a-92cb-440e-9a69-81700452faa7/how_to_name_covalent_compounds_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8cf43a-6284-4e87-8f26-40384a93ad10/9368688166.pdfIn PDF document text
    • http://webakipi.epizy.com/vosevitilale.pdfIn PDF document text
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_a6332908cef347c091126240b8a5970b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3f5201-f74a-473f-8e14-7df19dd82910/86377262569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f0b5c1-ffed-4418-928a-870eb7fc565b/american_bases_in_germany.pdfIn PDF document text
    • http://fukijudetoj.epizy.com/72668364078.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/no_signal_when_hdmi_is_plugged_in.pdfIn PDF document text
    • http://jutebef.rf.gd/99675325649.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 5524 bytes
SHA-256: 7f6bdd174a60a5668b43b3627c450f7424f172877f286a904a5fa02449a05052
font_01_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 11120 bytes
SHA-256: 36e2a6aa1cdb822e2b3367cdf330163a0dcd83c27a2ebf974a220d10aa5d2fab