Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86bced37e8cab0f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-12 04:37:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01f190a9a12b1a3c3b5ef30f1fc1c991 SHA-1: 637bb0ea2c36364174056674792171aed3344024 SHA-256: d86bced37e8cab0f39e270b7d05b7e906a858201b8eef22805cd81751e93e656
96 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, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'bologen.ru' suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/award?keyword=couper+un+pdf+adobe PDF link annotation
    • http://hdsamara.ru/29919373280fwh5v.pdfIn PDF document text
    • http://auth02mobility.com/define_configure_in_a_sentencetwxhf.pdfIn PDF document text
    • http://mainsale.pro/32953507100lyjs9.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/30272485682j0bv0.pdfIn PDF document text
    • http://new-volosi.ru/setuvizokujugogejujaxoxavkcpwm.pdfIn PDF document text
    • http://trackcreditscore.info/cien_aos_de_soledad_ver_pelicula_onlinexerdr.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/excel_formula_if_then_change_font_color.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/90388844728.pdfIn PDF document text
    • http://probmaka.tech/anjaan_special_crimes_unitbddx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaf26e0-3cd0-4cb2-a2da-210e93d45f44/ohms_law_worksheet_answers_13.3.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/vertical_and_horizontal_translations_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9864ef09-7cf8-4226-8d57-ce17c70d4c3d/88876463503.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/xulogugodikiwowisulujo.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/goldfish_platform_shoes_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/mu_cv_ting_anh_file_word.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/effective_communication_skills_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/rational_choice_theory_in_criminology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/82754801766.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/nepagodejafigiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/valanevulixabufezed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1126246a-1e66-4148-9ed0-49fa000d5907/23858745605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7837f0a3-f8ae-4a2e-b9da-a91bf8b5704a/audiolibro_amor_y_respeto_capitulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/22987775689.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/cesco_digital_apk.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_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 4868 bytes
SHA-256: 65c331e26bb963108476bb97670079aca7cb7293e3cfee86f686f2b8e78f4455
font_01_sfnt_off00010968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 11808 bytes
SHA-256: efca8627e03da8050dcabc9448b2b9aa644ae72aed8d2333b8afe8f79af04e61

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