Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4ffc0a491770da…

MALICIOUS

PDF

98.2 KB Created: 2021-03-27 18:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40dc084618d8c7c006d4e0bf12279711 SHA-1: 12224dc583d9d68793925cfef8202ac043a9e54a SHA-256: 4e4ffc0a491770da0befe869f3c7d57465e85eb2e664d7ab4218c1d773eaafd4
104 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating a phishing or trojan threat. It contains multiple embedded URLs, one of which is explicitly identified as an external URI, suggesting a download or redirection attempt. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=requirements+engineering+deutsch+pdf
    • http://bridgecommerce.com/rekukudagutagujcbnz9.pdf
    • http://lovechat24.club/rakezapopelewariqedat.pdf
    • http://prizinsta365.site/cu2c2o4_nombre_qumico_para_sal_de_mbhma2.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://static.s123-cdn-static.com/uploads/4501233/normal_5ff30f43652d3.pdf
    • http://ketousa.site/destete_sin_lagrimaskhswj.pdf
    • http://fringigejy.site/wufamezivodovugojal97q0.pdf
    • http://cenderaoriginator.com/85861901579nwu11.pdf
    • https://cdn-cms.f-static.net/uploads/4365552/normal_60304a1b7ac6d.pdf
    • http://nojekufa.22web.org/53690484624.pdf
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fcee649e33c9.pdf
    • http://vakoxojokovuvi.iblogger.org/50027552570.pdf
    • http://alcozerox.com/952003765010cp4k.pdf
    • http://axecheat8.xyz/9472627704021ymh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_eb8a399bc236478c8ade7232accdefbf.pdf?index=true
    • https://a95edb9d-21e5-46e4-bb1b-b1fdf66a5dae.filesusr.com/ugd/09e34a_b9620b6896984b2eb47ce54613330c21.pdf?index=true
    • https://uploads.strikinglycdn.com/files/607fd3a5-a5ef-4b92-bc81-d5793aeae5c3/how_to_breed_shiny_pokemon_with_perfect_ivs.pdf
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_4c15b1cc71d14e4cbb3e2c182073fb0d.pdf?index=true
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_04599a672de849e4ad3503b721b8c065.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35a88d57-0985-40a5-8efe-1f9ac80169da/how_to_find_angles_of_a_right_triangle_calculator.pdf
    • http://nubimopupugu.rf.gd/fusion_bd_bangla_natok.pdf
    • https://uploads.strikinglycdn.com/files/7f572c82-6739-4ff4-86f1-2c95fe867edf/ironman_2000_inversion_table_reviews.pdf
    • http://filulakakinu.epizy.com/how_to_clean_nespresso_vertuoplus_with_vinegar.pdf
    • http://zalerifi.rf.gd/alimentacion_en_adolescentes_embarazadas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001147e.bin
d4c59e7aa795a4f3953c176d571305452fadc1f2e814a49a4890f4d477c2b19d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 5460 bytes
font_01_sfnt_off000126ea.bin
efe2e197b72f18ed9633d422e75ad95e2301f7f8c697b48dee100741c23d203b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 11620 bytes
font_02_sfnt_off00014ed2.bin
2a7db98d26d5a7144d44517d6e1b74e53944e711ee8113adc4bbc4c6e4e67242		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED2 14980 bytes

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