Malicious PDF — malware analysis report

Static analysis result for SHA-256 e286a8a6903e078b…

MALICIOUS

PDF

70.8 KB Created: 2020-12-17 02:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ea188c49cf15de7f7c277630a8cc0df0 SHA-1: bf7f42b6031ddeb1d190602f9e8fce610cf29fbf SHA-256: e286a8a6903e078b84611f9aa37a49fa1a516ddfcf4ac7030e95bc7dda16f4a6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?utm_term=vivitar+bluetooth+speaker+setup PDF link annotation
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/tifutemisutix.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/kegubinefuda/81087766285.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d673c02f22b9d039e5c/1606372713829/mefesetiwezazibosekutum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61635147b148042b0f75/1606377835516/74842610803.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/email_capture_wordpress_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5169dbe9b69395125da21/t/5fc967e80d07ef0edd0b937d/1607034858330/stress_management_techniques_at_work.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc53128e18c5c478ea302f7/1606758704045/15311712646.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc0facd145a8629dcd3f518/1606482640005/what_does_it_mean_to_be_alive_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc0e211a97599144e17dd69/1606476305868/29979523885.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/bhimavaram_bullodu_full_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bb043dfdd95b60d43b6d/t/5fc50ab25147b14804d1b572/1606748851298/shh_were_writing_the_constitution.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_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 5136 bytes
SHA-256: 8ab11f3448d26ac6dad5d52a74e22897352d9b0c515c6d473de7bd58c5dff6bb
font_01_sfnt_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 10752 bytes
SHA-256: bab949c76a921baf750675012b00be9290de441dbf25a3c0cb17b6bf323e71b0

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