Malicious PDF — malware analysis report

Static analysis result for SHA-256 949ce512b77d4dfe…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 13:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cfe70df3c40c113833bb0b1c5835b277 SHA-1: f85309a9e8fe30224547a97d37ab027957e4e9b7 SHA-256: 949ce512b77d4dfe5dd409919135a2b5492f0216c1611152e998707b11221af9
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to distribution channels and PDF, suggesting a lure. The embedded URLs point to various domains, some of which are flagged as unknown or potentially malicious, indicating a likely phishing or malware distribution attempt.

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 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/award?keyword=canales+de+distribucion+tipos+pdf PDF link annotation
    • https://cdn.sqhk.co/jerowerar/dicdkjg/tubemine_apk_hack.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/alzheimer_s_disease_review.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/topogepesoveban.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/wivitofegajuxej.pdfIn PDF document text
    • http://fowatufilomit.iblogger.org/wesatugunuvowufupos.pdfIn PDF document text
    • https://cdn.sqhk.co/feledigowud/fhgfqiO/65304236559.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/79599300441.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/j5nChi9/temajulotivaxiker.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/UhgifC1/4fun_dance_program_tv.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/23027665115.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/juxosorepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaxutakizet.epizy.com/12749264489.pdfIn PDF document text
    • http://widafasamuj.epizy.com/wordpress_login_form_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccb5055-298b-4951-888c-21e11fa8a12b/jupisekajepalezanizogot.pdfIn PDF document text
    • http://bapuwejotip.epizy.com/12107530166.pdfIn PDF document text
    • http://munakazoxan.epizy.com/42697644290.pdfIn PDF document text
    • http://kepebotu.rf.gd/venn_diagram_probability_questions.pdfIn PDF document text
    • http://pemukusa.epizy.com/divosofuxewiniwemowa.pdfIn PDF document text
    • http://movuzawizigevej.myartsonline.com/93103215370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674c1494-58f8-463f-b969-8a9ef89216f6/conceptos_y_definiciones_de_la_investigacion_de_operaciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e2c797-0d3d-4f27-9a25-50a660fb8864/20858219060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4d2339-d8b7-47b4-87df-a6b9fd6dfd9d/python_for_beginners_-_learn_python_programming_in_hindi_free_download.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_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 5196 bytes
SHA-256: 6d5ebaabfe79c7633d7abe48e0b7336e4aaba12655f58b2a7b10439e661ec50f
font_01_sfnt_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 12652 bytes
SHA-256: 14280d7f2068576b286d89ad061a4c3f3a9833edcda02584390e95b2f5818d90

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