Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cba3ceea3c61b52…

MALICIOUS

PDF

79.8 KB Created: 2021-04-29 16:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c30284ef6682f1aa5b23990778069fb0 SHA-1: ce96a3487bf34f3f4e8e4a5799708e3fce770e1a SHA-256: 2cba3ceea3c61b524c396840a8a21c4ba4b2cc3d0c8c0c8455d2bd11f75721e1
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body's text, 'Red cross first aid kit supplies', is likely a lure to disguise the malicious nature of the embedded links.

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
  • 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 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://dafemum.ru/strik?utm_term=red+cross+first+aid+kit+supplies In PDF document text
    • http://kosufezegaxid.iblogger.org/83451224052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_6050fb6e84709.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/gefazisusedizepuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_605b058756deb.pdfIn PDF document text
    • https://sozazoje.weebly.com/uploads/1/3/1/1/131164180/lonovixelelaz_kirobifiwebubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_6028146c2d496.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://roxegut.rf.gd/convert_to_word_adobe_login.pdfIn PDF document text
    • http://laxolivavaru.epizy.com/tomb_raider_hall_of_ascension_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96c623d-2f93-410b-8e44-f0d9379476b2/siwokegigewesi.pdfIn PDF document text
    • http://jegepifewomu.epizy.com/68969568881.pdfIn PDF document text
    • http://pawulufotes.epizy.com/airworthiness_procedure_manual_chapter_3.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_3a189278576f46d3b305ee5d4a1f8db3.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_a172b5f1025641b0977c70209190b524.pdf?index=trueIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_c77af3000fee478f852afe0c36c60d26.pdf?index=trueIn PDF document text
    • http://mofetezasenur.epizy.com/workers_compensation_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f981cc-1b5e-46d7-9cfe-0efd95ec0053/33229592382.pdfIn PDF document text
    • http://buxodanukesidup.epizy.com/abnormal_behavior_psychology.pdfIn PDF document text
    • http://fepadegan.epizy.com/atrial_fibrillation_the_latest_management_strategies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 4996 bytes
SHA-256: a7b5d2e07c32c06666e08164ecd6dbda427b4bf1c6d7a101429d3f6c2288d924
font_01_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 10576 bytes
SHA-256: 45b3e799359ab4d7a39db6e4652e217231d7a5f4feda3da958a25513b829b5fb
font_02_sfnt_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.