Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0a735e67c6986f…

MALICIOUS

PDF

77.9 KB Created: 2021-03-28 09:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac633c8616786a2b0060baecb5849b7 SHA-1: 962f3de7cc5522c092bc02cb299a003631567850 SHA-256: cd0a735e67c6986f67ad6a077b9cadb40f980e3249dd9bd022d6d2d8107ce698
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://lozipotod.ru/award?keyword=new+trends+in+human+resource+management+pdf
    • https://static.s123-cdn-static.com/uploads/4367277/normal_5ff1d37dce57d.pdf
    • https://static.s123-cdn-static.com/uploads/4401976/normal_600267282f414.pdf
    • http://kalowodopole.mygamesonline.org/components_of_genetic_variation.pdf
    • http://gepopusoka.mypressonline.com/fl_studio_price_south_africa.pdf
    • http://tezosomebapixim.22web.org/ruvez.pdf
    • http://kidiwutimako.mygamesonline.org/52395523119.pdf
    • http://dekagexagupeje.iblogger.org/30415457227.pdf
    • https://gumevimarijefa.weebly.com/uploads/1/3/1/0/131071167/defitobigadari-valolira.pdf
    • https://jisawawaxiwibes.weebly.com/uploads/1/3/1/6/131606947/xijem_suzokovegapukij.pdf
    • http://jidogirikar.mygamesonline.org/tumagudebaboze.pdf
    • http://rasezatoxefu.mygamesonline.org/la_amortajada_resumen_libro.pdf
    • https://zesijedoroge.weebly.com/uploads/1/3/4/3/134372038/382f1130.pdf
    • http://lowabunuzoxa.getenjoyment.net/anorexia_bulimia_y_otros_trastornos_alimentarios_libro.pdf
    • https://zefokivovemajo.weebly.com/uploads/1/3/0/8/130874141/83f0248f5fe.pdf
    • https://cdn-cms.f-static.net/uploads/4486190/normal_6012a0a29877b.pdf
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/ef697025d2266d.pdf
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fe7735ed9eba.pdf
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5fcbd7f77ef40.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://larovitivejel.atwebpages.com/xirivulefivododovelogajuw.pdf
    • http://waxukapavi.rf.gd/18164889669.pdf
    • http://kavezusi.onlinewebshop.net/10256207836.pdf
    • http://siwemoxoxawevuv.atwebpages.com/cabala_calculo_del_arbol_de_la_vida.pdf
    • http://litufowanukoro.epizy.com/55902497217.pdf
    • http://vekamodadon.onlinewebshop.net/dictionnaire_argot_franais.pdf
    • http://benepuru.epizy.com/biblia_reina_valera_online.pdf
    • http://gurevetafajes.epizy.com/etiologi_stomatitis_aftosa_rekuren.pdf
    • http://satekivu.rf.gd/biology_gk_questions_and_answers_in_telugu.pdf
    • http://wesamejoz.epizy.com/prophetic_dream_dictionary.pdf
    • http://menasore.epizy.com/personal_loan_preclosure_calculator_excel_sheet.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_off0000f328.bin
d66e817b52255ebb017c4304901240010b39971ff9670f978f209a045c530aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 5596 bytes
font_01_sfnt_off0001061f.bin
24ce5e4438db075652f3080cf6ddbdb95b15f45045e34c8b420da91c8d1fa186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 10340 bytes

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