Malicious PDF — malware analysis report

Static analysis result for SHA-256 246553030c7b2703…

MALICIOUS

PDF

75.1 KB Created: 2021-03-17 11:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4b1d251da29f7a6f744297c4679276c9 SHA-1: e05946bd15bbf8c452a432cd445c01566274cfe6 SHA-256: 246553030c7b2703f01e4eaea916c8ad2518643c16c4003181420192b7e524d6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score indicate malicious intent. The primary malicious URL identified is 'https://resalured.ru/award?keyword=adjectives+comparative+and+superlative+list+pdf', which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=adjectives+comparative+and+superlative+list+pdf PDF link annotation
    • http://tisigetid.iblogger.org/medal_design_template_psd.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/milk_and_honey_book_all_pages.pdfIn PDF document text
    • http://tiwirulesu.iblogger.org/79797669557.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/86807278640.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/sukodawigimaliroko.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/delonghi_dragon_heater_amazon.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/zufasilatipuni.pdfIn PDF document text
    • https://zukujiwad.weebly.com/uploads/1/3/4/4/134491014/3369169.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/xarodamusivaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/28108827912.pdfIn PDF document text
    • http://fivajopafovile.rf.gd/xexarisomaguvedazas.pdfIn PDF document text
    • http://pijutisiguzog.rf.gd/42701490427.pdfIn PDF document text
    • http://punifaz.epizy.com/83740036067.pdfIn PDF document text
    • http://tojederetesez.epizy.com/11734443365.pdfIn PDF document text
    • http://supidanerij.epizy.com/chicken_wings_new_york_guide.pdfIn PDF document text
    • http://nunidekizezovaf.rf.gd/4064818369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01624b62-2628-4f71-a1c7-5de1dd68071b/hp_pavilion_dv6_full_specification.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/42679065574.pdfIn PDF document text
    • http://fejolisevew.rf.gd/radenerer.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/varenazalutat.pdfIn PDF document text
    • http://zolatudikaza.rf.gd/before_i_fall_lauren_oliver_english_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147567e2-5535-40cc-a7f4-d491d606fc79/andrew_loomis_espaol_descargar_gratis.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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 5424 bytes
SHA-256: 7b574d5e233bfa936f46d4aba6270dedb44a97c2ee640a4cc5e9c5f817db7e71
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 10776 bytes
SHA-256: 8fe3e0e576257023049bd0695b287ec1c6a8c52987bed5f05911bb2c60294b43

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