Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec05565f58950244…

MALICIOUS

PDF

72.3 KB Created: 2021-04-01 12:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b095c43576fa897859e84f4bf326b9e SHA-1: d85a23043f249d580180890998f67f028e9360d5 SHA-256: ec05565f58950244b426cddd353d26e6ecb73d14639dc2b8af561db462fcb36f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. No scripts were extracted, but the presence of the URL and the ML/AV detections strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=fernando+pessoa+livro+do+desassossego+pdf
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/537841.pdf
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/2dc3caae8e0.pdf
    • https://pazuvokase.weebly.com/uploads/1/3/4/6/134615635/fetipu.pdf
    • http://mapenibo.scienceontheweb.net/mijusunanogava.pdf
    • http://suzamajotibe.mywebcommunity.org/33270973815.pdf
    • http://lamanixumerad.mypressonline.com/6th_bipartite_settlement_for_bank_officers.pdf
    • http://pakirekugep.scienceontheweb.net/zemozetusofif.pdf
    • http://rilomenininun.getenjoyment.net/how_do_i_update_my_samsung_j5_software.pdf
    • http://zimezobot.getenjoyment.net/60552682806.pdf
    • https://cdn-cms.f-static.net/uploads/4471096/normal_606029a773ba5.pdf
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5ff0e57381d88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ledolabufimo.epizy.com/stylesheet_directory_uri_wordpress.pdf
    • http://tirisesu.onlinewebshop.net/zuganezo.pdf
    • https://uploads.strikinglycdn.com/files/0d8418f5-983b-4597-ac23-b7d51db228ff/23158529488.pdf
    • http://wutejaxevewef.myartsonline.com/ruger_sr22_ammo_problems.pdf
    • http://zobuwijezad.onlinewebshop.net/rezunuto.pdf
    • https://uploads.strikinglycdn.com/files/21766777-df40-4538-815c-c129612feab6/microsoft_excel_learning_file.pdf
    • https://uploads.strikinglycdn.com/files/b06c190e-22b8-4091-8cab-b70c88eefc60/operating_system_concepts_ninth_edition_by_silberschatz_galvin_and_gagne.pdf
    • http://jowokepo.atwebpages.com/60972745616.pdf
    • http://faminosokaru.epizy.com/automatic_guided_vehicle_ppt.pdf
    • https://uploads.strikinglycdn.com/files/b54fdda4-6610-4b29-860e-82140eaec57d/dell_vostro_1500_maximum_memory_upgrade.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_off0000d778.bin
c85c526da0acf3440d46265838799672a31080e378feb1de63a463a877fecef4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD778 5224 bytes
font_01_sfnt_off0000e958.bin
de8fa35105cc62acc228a5ea7e870a0cb2af86783d35443edea99e77074869b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 13424 bytes