Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6b380176b8e21b…

MALICIOUS

PDF

69.7 KB Created: 2020-12-21 20:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 393697a533338c8fd14d38be207b205f SHA-1: be9fb85fe4d0dece35c2a6d0ba887a8c267d4a20 SHA-256: 1d6b380176b8e21b1995cc2eb4fad2a99502e33e9d258f35fa1ce31545e6b0c5
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, forming a link farm, and also includes a direct link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

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
  • 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.
  • 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://traffmen.ru/strik?utm_term=tags+to+get+likes+on+ig In PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/xijuluzidele_luferuvivo.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/9167859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fdc0c732b0db.pdfIn PDF document text
    • https://ledugatikafaf.weebly.com/uploads/1/3/4/6/134693541/siwavivuzavap-duluwimuruvekar-wujilebaxezonag.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/mukoxe.pdfIn PDF document text
    • https://nonuvatemex.weebly.com/uploads/1/3/4/4/134443968/paduwunamazel.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/4735710.pdfIn PDF document text
    • https://sixenufum.weebly.com/uploads/1/3/4/3/134310240/5132744.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/6fba2486-df12-49aa-9b39-2906046c5997/nanedetuxixumitotarexeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fc2b8243c02f22b9d663621/1606596662157/vubopuxejepibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe35e5fe-ab92-4ce7-bc18-894424399148/the_red_scare_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe02396d610986319788707/t/5fe06cfdd85ca26442327f7a/1608543486576/63641905689.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ac042e537a05ef314d38/t/5fcbce4db6b736615202afe8/1607192142388/lutovoxigufis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf535b4e98326c02075e5d/1606374237452/atf_form_5320.1.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_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 4768 bytes
SHA-256: 90aab5baba8e0c551bd9bd456cc1938b3dc4c29127c1ea6f3d24de7af4d564eb
font_01_sfnt_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 9784 bytes
SHA-256: 97ad0c6e96c557e2e5c39c155a10e922366e704829da74fa4f8af742135943c4

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