Malicious PDF — malware analysis report

Static analysis result for SHA-256 6028a9196ed425a1…

MALICIOUS

PDF

66.9 KB Created: 2020-11-14 00:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3cf74a6cd0acf7f81daed75ba20578fb SHA-1: 5fe50f7f9439e94c15eba28f244b2865d7571bb9 SHA-256: 6028a9196ed425a18964f37bb4d0f9166310bd0c8b17cf11c177f61f1bae0e69
324 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable hosting, and one specifically to a known malicious redirector. The document also employs social engineering tactics, instructing the user to copy and paste commands into a terminal, consistent with ClickFix attacks designed to bypass macro restrictions and execute arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://cctraff.ru/strik?utm_term=touchpad+driver+diagnostics+keeps+popping+up In PDF document text
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/gasodewuwuw_vewaruwejes_biwusepawuwolek.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/dikuxazefuxixejezet.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/b56e4c5380.pdfIn PDF document text
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/7bc279f76f.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/sezokefajose.pdfIn PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/kalugexexedipep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b5d4c4-8b31-4da1-930e-5545e68f80b0/47620532860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e034b6-3a72-4043-add1-deef362bd550/1702948655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f58f7f-6e91-48ac-ae68-1e7b11765fb3/niwekusuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/lowelemavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47e9c6d-7e6f-4e43-a673-fcab0dfa4bed/81708766762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d35473-5a0b-4377-aefd-5c467d749bf1/uscis_citizenship_application_fees.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_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 5376 bytes
SHA-256: 2c95dbe6e98975723803cb2d73a39bea04e2b2f9c4502ba55e11bb06edb522af
font_01_sfnt_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 10692 bytes
SHA-256: 13549c4dc016ef2d6d94fd695951d8baefd3f9f4a32340873ddd5702780aec14

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