Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c916790c259e2ba…

MALICIOUS

PDF

84.3 KB Created: 2021-03-20 06:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0b6f9b7ee8bf266449e9b4ffc74d800 SHA-1: a91f13289e99c8733e4cbbef913f1bc5079afc1f SHA-256: 5c916790c259e2ba213f2f593b3bfcff48131722b27d21980f9a86c74c4045a2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=sfdc+lightning+developer+guide PDF link annotation
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/jodajawumidev.pdfIn PDF document text
    • https://wujadagepixiv.weebly.com/uploads/1/3/1/8/131856877/setosevogerilo.pdfIn PDF document text
    • http://helper-badges.com/miwewadubifolitowgkhxr.pdfIn PDF document text
    • http://simultaneously.space/vubalevirurekitutopaxekigy4tme.pdfIn PDF document text
    • http://ginisuna.iblogger.org/2331988663.pdfIn PDF document text
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/3624069.pdfIn PDF document text
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/f940c30e.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/73430305247.pdfIn PDF document text
    • http://vawitamabizegef.22web.org/worksheet_of_punctuation_for_grade_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezadoni.rf.gd/heathens_live_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7c9e4c-6356-4b44-b15f-10428e150d20/greek_girl_warrior_names.pdfIn PDF document text
    • http://solobasoridevel.epizy.com/what_are_the_responsibilities_of_front_office_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8fcf30-b085-4ec7-a2f7-60a9fc30bded/how_to_learn_algebra_easy.pdfIn PDF document text
    • http://gepifefepafopok.rf.gd/control_system_design_guide.pdfIn PDF document text
    • http://fogusevo.epizy.com/rixozetej.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/sepsis_infection_icd_9_code.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/gabaxujedukatokenizeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2fdded-d61b-454f-bccf-1785d3a7570d/95931751058.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/nanagoravug.pdfIn PDF document text
    • http://muduwabu.rf.gd/criminology_a_sociological_approach_6th_edition.pdfIn PDF document text
    • http://rafesule.rf.gd/what_is_the_importance_of_organizational_structure_in_small_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5774233d-e45b-402c-b956-e0b902e8f2c8/bissell_little_green_pro.pdfIn PDF document text
    • http://guxodolabisiruj.epizy.com/automatic_transmission_parts_and_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/concours_castor_informatique_plateforme.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_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 5192 bytes
SHA-256: 0eee5a4d5ad3000818bbbf52e6ea532f63e963ed74a35f1484bc1171a0f45755
font_01_sfnt_off000117ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117ED 12480 bytes
SHA-256: 15874f295fd08faede7d0aa453dca27a2554b97a53ba3866a5cbacf099fab64e

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