Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0587833b6d3aa8…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 09:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42fd09e07ac1d9587fa38508c14bb7d0 SHA-1: da6b5fa7a2432195c441e441da809b801d5d3639 SHA-256: ea0587833b6d3aa863d8a17b6e48f6cdbde6e5a42f1696d80a77d56cb19a967f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=neoliberalismo+economico+pdf
    • http://goodnatural.space/gre_vocabulary_app_free_downloadnyiqp.pdf
    • http://loveworld.club/alkaline_acid_food_listmjmnx.pdf
    • http://bavavemerit.22web.org/60263088582.pdf
    • http://lnstagramcopyrightcenter.com/vengeful_spirit_horus_heresyzxrxv.pdf
    • http://meriline.store/bollywood_hd_movies_free_khatrimazamm495.pdf
    • http://jadogaxarabu.mygamesonline.org/novecento_alessandro_baricco_gratis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0c63ee2-c3a7-4288-80d6-090bd852986c/mutant_and_masterminds.pdf
    • https://s3.amazonaws.com/lomiwexuva/loxomugopudamat.pdf
    • http://vekamodadon.onlinewebshop.net/mito_definicion_y_caracteristicas_para_nios.pdf
    • http://folujas.epizy.com/xomelopoguxedanudelitiv.pdf
    • http://wiratobut.rf.gd/73854544116.pdf
    • https://s3.amazonaws.com/xiwevitox/8940389034.pdf
    • https://uploads.strikinglycdn.com/files/c3b0534d-73ae-4caa-b543-4dfcfdac0171/the_great_depression_was_a_period_of.pdf
    • http://goruwon.epizy.com/what_can_i_do_with_a_masters_in_cell_and_molecular_biology.pdf
    • http://pegawatovejugav.epizy.com/berliner_platz_3_neu_glossar_griechisch.pdf
    • https://uploads.strikinglycdn.com/files/94dcf883-07c2-4af8-ad24-d62378fa87d5/where_to_get_rid_of_old_clothes_near_me.pdf
    • http://didaduxazej.epizy.com/english_language_activities_for_preschoolers.pdf
    • http://saritimiramig.rf.gd/adidas_women_s_joggers_size_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb9.bin
a9c457cc72fbaf4cac978f390d3e9f36bae273cafdf6e5b01f14aee0268134ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 5412 bytes
font_01_sfnt_off0000fe05.bin
822d2ea20880c6b0a243e98673558497c2a85c381a55f5da7e9caeb6037a588b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 11280 bytes

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