Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0d7476df26dcc3…

MALICIOUS

PDF

79.9 KB Created: 2021-03-01 14:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d0d9da63c9e1fd421ede9e464ea7d03 SHA-1: bf8bc19e671f47a81025bf1271ecba6ea46b29dc SHA-256: 8a0d7476df26dcc3de6cae5f84b7777adf4a2db9a5953bb3c9acc24c58b83970
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though heavily obfuscated, suggests a lure related to 'visual basic tutorial for beginners pdf'. The primary malicious URL identified is https://ponafet.ru/strik, which is likely used to host a phishing page or distribute further malware. No scripts were extracted, but the PDF structure and external links indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=visual+basic+tutorial+for+beginners+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368486/normal_602ed62a50e63.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/81921680107.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/morudonidiseropawalexoduw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5fcc4a33e0280.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/stihl_ms180_14_bar_and_chain.pdfIn PDF document text
    • http://xefakuwejufo.iblogger.org/brushes_for_illustrator_cc_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446497/normal_5ff2dbaa59803.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/23214710625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_6039fa16ce259.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/husqvarna_yth_150_belt_diagram.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
    • https://s3.amazonaws.com/gupojakami/karl_jenkins_benedictus_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/baroque_and_rococo_art_and_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/how_to_take_apart_a_presto_dehydrator.pdfIn PDF document text
    • http://mojilobopage.rf.gd/circulatory_system_questions.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/66603923356.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/bupurobedem.pdfIn PDF document text
    • http://girofili.myartsonline.com/geometry_chapter_3_resource_book_mcdougal_littell.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/nutevaviz.pdfIn PDF document text
    • http://perowal.rf.gd/blue_point_eecr1a.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/christmas_wedding_planner_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/army_decision_brief_powerpoint_examples.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_off0000ee87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE87 5308 bytes
SHA-256: 39ea367756693039da9f84ae179bf648803b32cde0e286d823c0072350fcb2fd
font_01_sfnt_off00010090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10090 10364 bytes
SHA-256: 590d96c911cfe79e71cda686b46632cfe008d333d4483796ea5a31cb35ab1a49
font_02_sfnt_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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