Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e993e7e9743ef00…

MALICIOUS

PDF

75.3 KB Created: 2021-03-14 22:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 04dc7b073eba01586391aee9a34ee522 SHA-1: 979e62ddda8e2da7a20ad88b0df8f775237dc597 SHA-256: 3e993e7e9743ef00a0da020504b3ec10d40a3f820584f1d38c14aafaa7991b65
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://mezovuduw.ru/strik?utm_term=amazing+things+to+draw+step+by+step PDF link annotation
    • http://kersita.fun/class_notes_templatecunst.pdfIn PDF document text
    • http://ig-mediateam.net/what_are_the_3_stages_of_metabolismbuh4s.pdfIn PDF document text
    • http://gomunawuwox.22web.org/red_lobster_nutrition_information_chart.pdfIn PDF document text
    • http://kafixerutatad.iblogger.org/mezowesa.pdfIn PDF document text
    • http://xasusofeg.iblogger.org/data_handling_bar_graph_worksheets_grade_5.pdfIn PDF document text
    • https://fodukajanewirom.weebly.com/uploads/1/3/5/3/135383911/kabupalodiwazirital.pdfIn PDF document text
    • http://hopecommunitynaz.com/59516880574acf60.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/tasana-jenalatasewile-dimupetitiv-sofopigumovu.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/48dd677b-5a47-4b8c-b5e4-9231f34849d7/14_sleight_of_mouth_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/64686072200.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/barbados_us_embassy_application_form_visa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d0758f-61c7-4b39-b43d-e3e334d93b6a/what_is_the_concept_of_rehabilitation.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_8104d29a82c146b6b6f426f269fe771a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/13851263471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894bd4dd-60c1-4d26-aa05-c996bbb25cd2/sajumegemoloso.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_50dbdbbbf79f4ca3ba9bffb2d2f6d5ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a830d593-dfe7-4654-928e-3b9023f56fc2/tyler_florence_pulled_pork_and_coleslaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/magnum_inverter_remote_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/what_is_electrical_system_in_automobile.pdfIn PDF document text
    • http://wumaxodozitokaw.epizy.com/nagezajimalitopulufeku.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_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 5716 bytes
SHA-256: d0d42f4f4c97c9edf35f00376992ae4e5c51401a2c187ace20171e36eebddd99
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 10132 bytes
SHA-256: 88e5349dad81fb1dfb4b2599988c293bc95d2942c9a1e35367a4c90e2cdbbf86

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