Malicious PDF — malware analysis report

Static analysis result for SHA-256 89031e7e14bc3d4c…

MALICIOUS

PDF

69.6 KB Created: 2021-02-22 22:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 40ac25035aa5c0feb1671fa38a864bad SHA-1: b4a74a9fc6f8b4edf74502d59568b413755a47d4 SHA-256: 89031e7e14bc3d4c3c0b9ae629d9041b3fb5271a8a7c29653078064e80f2c06b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://seumenha.ru/wix?keyword=circulation+diagram+plan PDF link annotation
    • http://tupuwuwegidava.22web.org/krups_xp1020_steam_espresso_machine_manual.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/7349919.pdfIn PDF document text
    • http://pogetukexuk.66ghz.com/fancy_text_editor_apk.pdfIn PDF document text
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/a92662.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/ccf74a4eba.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/81797915063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://govamizoxixe.epizy.com/dajum.pdfIn PDF document text
    • http://dudowowadoz.rf.gd/how_do_i_clean_my_keurig_k10.pdfIn PDF document text
    • http://wutopow.epizy.com/subordinate_conjunctions_ks2_worksheet.pdfIn PDF document text
    • http://riperuzitino.rf.gd/acca_member_jobs_in_uk.pdfIn PDF document text
    • http://xatabaxad.rf.gd/bootstrap_4_blog_template_free.pdfIn PDF document text
    • http://tubaduk.epizy.com/kikajom.pdfIn PDF document text
    • http://kasesapat.rf.gd/xifalobizo.pdfIn PDF document text
    • http://jotikovan.rf.gd/ginaliwilozagazukudebe.pdfIn PDF document text
    • http://pogitijerilux.epizy.com/dating_website_template_wordpress.pdfIn PDF document text
    • http://zonefodewev.rf.gd/sawerebopazosumogujajel.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_off0000d488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD488 5120 bytes
SHA-256: fc6c7ab850ed781df53dfa79aca6f91b3f4903e159bbf412add486c3f287ea76
font_01_sfnt_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 10536 bytes
SHA-256: 29a5d9cf518a34e3520a015d28a8229a08d8aaba0a575a3048c93db9d8d4ae6f

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