Malicious PDF — malware analysis report

Static analysis result for SHA-256 20830e36584fdd0b…

MALICIOUS

PDF

94.4 KB Created: 2021-03-18 14:25:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6187126fb3c5569bcd7c70c4ca0c6e71 SHA-1: 504ee502a351c02436dbbdce6fbbaaabea57b21e SHA-256: 20830e36584fdd0b96717883af8a05efef44cccf37f5b551371105b03b94c1da
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/wix?keyword=online+ms+paint PDF link annotation
    • http://basagutidabe.sportsontheweb.net/79177094563.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/progressive_reloading_press_for_sale_south_africa.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/60344252693.pdfIn PDF document text
    • https://linoraza.weebly.com/uploads/1/3/1/4/131437671/fakesuferadi-banepozeseb-faxosavusumifu-subewuzoti.pdfIn PDF document text
    • https://voresefum.weebly.com/uploads/1/3/0/8/130813922/genuzebi.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/zotupuvap-tapovemedamix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_b0a171cecef14c89b3ae1b150335a67a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/pamphlet_template_google_docs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/70467406562.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/asus_m4a785td-m_evo_drivers.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_96ef082876ac48c2b8d09af5d7779de0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/nezutazimizevobug.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/87019658906.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_88316107e4c344e8aef1a2852f44aca0.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_0b27099473a54c41bb870df82c70d629.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_a4ed63aa9bc94e62846030a26cefa5a4.pdf?index=trueIn PDF document text
    • http://rerovoxuwalutew.epizy.com/delegation_of_financial_power_rules_1977.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/musculoskeletal_assessment_form_physiotherapy.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/jisunulotapo.pdfIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_91e6b3b16ac246ef8362b6ff803078a5.pdf?index=trueIn PDF document text
    • http://roxeruteruda.epizy.com/pokuzudaxira.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_6ebadb371da349fc9b13d4e84ce33657.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 4896 bytes
SHA-256: 53f3f5726f731a3b22aefbedfcea33ae6816372fd1723c6a19b140a4a6a9e6fd
font_01_sfnt_off00012bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF0 12664 bytes
SHA-256: 2c7977511946036d083ea0c18cbed058c587800dc5d6a6d620747c09f72fa98b
font_02_sfnt_off00015590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15590 16188 bytes
SHA-256: 96804e3c7c8cf8d06bea6cf59a056357e7796da2d8af6ec8a3c206b685a20760

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