Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a59a474742e6ef6…

MALICIOUS

PDF

73.6 KB Created: 2021-05-25 03:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7d68d2b3793f9a34156fab0ff04de55b SHA-1: 3ebc9d4d9c937117e478a1a8cdbfc2bacc582fc2 SHA-256: 2a59a474742e6ef656728e309bef20d64340b7dbfe0fb1772ae1472bdde1deab
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or phishing operation. The primary URL, https://vilenefex.ru/strik?utm_term=fundamentals+of+management+10th+edition+chapter+1, is likely part of a phishing lure. No scripts were extracted, but the PDF structure and numerous external links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=fundamentals+of+management+10th+edition+chapter+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426416/normal_60171ac781b4a.pdfIn PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/1422163.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/mipuvomagar.pdfIn PDF document text
    • https://vaxokivov.weebly.com/uploads/1/3/1/4/131453734/1641816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_6067e934cdb9f.pdfIn PDF document text
    • https://mibofadap.weebly.com/uploads/1/3/1/6/131637701/7767132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fd0464ab5a93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ff7118f698de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_606346a94a159.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/rukexonupibadi_fokolapasoli_warezide.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/1496536.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/d9dc9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_602ddcb6a0395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/zezawokex.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/transparent_hoodie_template_roblox.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/44970458326.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/87312529892.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/durigagekarafamokobiruta.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/gta_4_aptoide_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/where_can_i_watch_war_of_the_worlds_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/betopowakax.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_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 5716 bytes
SHA-256: bcdc85e21378d5b603a083052e02f62cb9e987aa2207f9ed76209f66225fb1c5
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10488 bytes
SHA-256: f2463fe151f16af3759076c1681754e4a6635693516fbc30f84db2395c2253fe

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