Malicious PDF — malware analysis report

Static analysis result for SHA-256 70300324c38c5eb7…

MALICIOUS

PDF

74.3 KB Created: 2021-06-07 13:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a6b08178e040500e9343fad08cbaffc5 SHA-1: 36c18327fb5424ae31e054530bbdee7e7272bf42 SHA-256: 70300324c38c5eb7c6a5b3f098860d1603bcf0ad96e57600f9ef96475b15d611
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('irlanc.ru') that is likely part of a phishing or malware distribution scheme. The PDF structure and the presence of embedded content suggest it's designed to exploit vulnerabilities or trick users into visiting malicious 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
  • 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://irlanc.ru/pbw?utm_term=what+are+the+active+processes+of+membrane+transport PDF link annotation
    • https://getariko.weebly.com/uploads/1/3/4/9/134904460/9575059.pdfIn PDF document text
    • https://jotopivazujofid.weebly.com/uploads/1/3/4/8/134881135/81f994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_6019233dd0011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5ff5331d0ce95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_602e4dfd98c04.pdfIn PDF document text
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/2763187.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/dusulifipuse.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/wavonuzetebazi.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/75182c13-f92a-4d51-8c07-9c477bb672d6/48287502121.pdfIn PDF document text
    • http://gediripu.pbworks.com/f/49919487193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee37627c-85bd-41f2-af2b-7ef5f8f4bc56/bayliner_175_service_manual.pdfIn PDF document text
    • http://nugewil.pbworks.com/f/what_can_you_eat_on_30_day_challenge.pdfIn PDF document text
    • http://febigadeviti.pbworks.com/f/cesar_chavez_main_accomplishments.pdfIn PDF document text
    • http://radejaki.pbworks.com/f/the_karate_kid_full_movie_download_in_hindi_khatrimaza.pdfIn PDF document text
    • http://refarumiba.pbworks.com/w/file/fetch/144676386/55107039450.pdfIn PDF document text
    • http://pikalunik.pbworks.com/f/48518400253.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144783225/49376712647.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144420909/zuxilat.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/w/file/fetch/144593379/tecnicas_de_recoleccion_de_datos_para_una_investigacion_cualitativa.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/rns_510_navigation_system_problems.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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 5436 bytes
SHA-256: e79e11842d70664d8c0291d9bbc6e28e97401b38ca4598b22611dcd49281da1b
font_01_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 10612 bytes
SHA-256: f21bb35c91557aa2342b30aaab7cdc58b24c70625b9004298763a9444dfd48c3

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