Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1273829ccb78b7c…

MALICIOUS

PDF

73.0 KB Created: 2021-04-06 23:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 672276b191102e2a11ca907190ecc10a SHA-1: beba5dae43d715832adba96a42d9de526594fd50 SHA-256: b1273829ccb78b7c2104e14bf44c68e45df7e4a9ad1227d355c710f8d446e791
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded external URIs, with the primary one being `https://dafemum.ru/wix?keyword=masters+tv+schedule+par+3`, which likely leads to a phishing or malware distribution site. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=masters+tv+schedule+par+3
    • https://cdn.sqhk.co/zoraxiraga/hehaihP/template_definition_biology_quizlet.pdf
    • http://vosojivaru.mypressonline.com/cbr_test_file.pdf
    • https://cdn.sqhk.co/wofutajo/deihOgi/fudutifor.pdf
    • https://cdn.sqhk.co/sewetotab/cnNiewj/switch_scan_amiibo.pdf
    • http://smeh-mif.space/dj_music_mixer_free_download_full_version5j8gq.pdf
    • https://cdn.sqhk.co/jimavidozeze/ZjdKTGX/77114862905.pdf
    • http://mazers.fun/statistics_and_probability_grade_11_textbook61ypi.pdf
    • https://cdn.sqhk.co/gepaxulunan/EiaIbij/short_information_about_football_in_marathi.pdf
    • http://sunazeremitiwu.mypressonline.com/89986189472.pdf
    • http://raxewaponoxiv.mygamesonline.org/thyroid_cancer_risk_factors.pdf
    • http://ligexekena.mywebcommunity.org/wewavokovedavalexezajena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kikanelomer.onlinewebshop.net/crimes_contra_a_administrao_pblica_concurso.pdf
    • https://uploads.strikinglycdn.com/files/4a0c7db7-5d4e-4bdc-bfa8-2caa37b85bab/aircraft_maintenance_salary_philippines_2018.pdf
    • http://jawikaginixuxuz.rf.gd/ledojubox.pdf
    • http://divifafapinuk.rf.gd/expense_report_approval_process.pdf
    • https://uploads.strikinglycdn.com/files/7ce9b45f-a82e-4550-bddc-8c0f7bd19dcc/how_to_become_a_paralegal_in_ohio.pdf
    • https://uploads.strikinglycdn.com/files/e54e4dc6-3328-4738-a3e3-b5290963584d/is_logic_pro_x_good.pdf
    • https://uploads.strikinglycdn.com/files/7bbe4151-63f8-402c-9566-ba8e5ccde4e1/list_of_transition_words_for_essays.pdf
    • https://uploads.strikinglycdn.com/files/f78039b5-62b5-476a-a5c4-434222177227/bumepujurofodivijomukow.pdf
    • http://nubuxaza.rf.gd/wesilovufobeloko.pdf
    • http://gumusimigogasuz.onlinewebshop.net/65612907862.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_off0000dea6.bin
04552f12affc5dd0f18b4c343a620dbe73818d3400a64b36bc59673f80360bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 5392 bytes
font_01_sfnt_off0000f10a.bin
167b519ab81a526879be1bb1eb97ccd15a8805675b6d6c3b0e3a6f2c9d41b8fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 11476 bytes

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