Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b3edad5e7baa95…

MALICIOUS

PDF

80.9 KB Created: 2021-04-04 02:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ff5dfb1dc03c72e26dc9797292afae SHA-1: db2c51b78f62216e8d9c82488075b2161e7dd53f SHA-256: 98b3edad5e7baa95e219db51f3a5c990c72dcad399426d6cdb0da5411ff07099
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, such as 'https://nipisod.ru/wix?keyword=delta+epsilon+iota', suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=delta+epsilon+iota
    • https://cdn-cms.f-static.net/uploads/4464541/normal_601dfcc9edb43.pdf
    • http://pazifelurup.medianewsonline.com/atharva_veda_in_tamil_free_download.pdf
    • http://bepifukikuku.mygamesonline.org/ncert_biology_textbook_class_12_free_download.pdf
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/vebij.pdf
    • https://cdn-cms.f-static.net/uploads/4389582/normal_6031f5adacbfb.pdf
    • http://nuvagefo.medianewsonline.com/cathodic_protection_survey_procedures_3rd_edition.pdf
    • https://tezimapegimera.weebly.com/uploads/1/3/0/9/130968984/bidunikibipuvelumapa.pdf
    • https://cdn-cms.f-static.net/uploads/4426696/normal_602d2ac1a725d.pdf
    • http://mujabelor.mywebcommunity.org/qu_enfermedad_produce_ardor_en_el_estmago.pdf
    • https://cdn-cms.f-static.net/uploads/4495691/normal_6046cc40a985d.pdf
    • http://polobasopika.mywebcommunity.org/actuadores_neumaticos_lineales.pdf
    • http://gilumesu.mypressonline.com/jurnal_anemia_defisiensi_besi_pada_ibu_hamil.pdf
    • http://pukujadud.getenjoyment.net/14986964240.pdf
    • https://tupodoki.weebly.com/uploads/1/3/0/7/130776149/lizagug.pdf
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/nikozaza-turizavonawim-tuduzilovunal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/94f3cd0d-0fcd-4841-806c-4745c65a6373/nilotulavijuwi.pdf
    • http://widusop.atwebpages.com/7th_grade_math_word_problems.pdf
    • https://uploads.strikinglycdn.com/files/e309d092-493f-4941-ac16-ee19cea8cf6e/42603917615.pdf
    • https://uploads.strikinglycdn.com/files/6d99d789-fd38-4d6b-b917-92e2aca8f9fc/are_graham_crackers_gluten_and_dairy_free.pdf
    • http://fuxuxasezid.atwebpages.com/7450798759.pdf
    • https://uploads.strikinglycdn.com/files/5d67e6f4-dcf7-4851-97bc-aee6bd1941b8/sazijenawofazalok.pdf
    • http://xevijojikutep.onlinewebshop.net/formative_assessment_methods.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_off0000fbcc.bin
4da6d460ee9ba9a432990de91eba1bc3ee6afe60b472b0dab636e351b05dc925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 4716 bytes
font_01_sfnt_off00010bf1.bin
1d78a6de3d4a888682795ec1ea77caa65dfa71a96677104f90ba28ba2527ff3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF1 12360 bytes

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