Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1e64690ed98c95…

MALICIOUS

PDF

78.6 KB Created: 2021-06-09 05:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 803273b1752510e95ea0c5059de38aca SHA-1: 3cccb971b7ddc67343d062960b82f09bd5ad9e21 SHA-256: eb1e64690ed98c959c2092454c07c9ed1490fa2c09e44fb51e518d90c131b32c
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'chcial.ru', which is likely part of a phishing or malware distribution scheme disguised as educational content. No scripts were extracted, but the presence of the malicious URI strongly suggests a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://chcial.ru/pbw?utm_term=class+12+biology+chapter+5+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455198/normal_6006046f268d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_600e9dfc1ed94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_606da52d43e47.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/3bbc3f95-59c1-40b2-9675-5bba8c57895f/how_to_get_corn_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f36fca-ee23-4945-b233-8256dbc1f23d/gizodilezezesizinimikurew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222e4d92-edc6-4f39-aa16-287c3eea71c3/limasiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ceab86b-6fd9-4bd3-a19b-cc9fd097135c/36711657470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1687db91-d90c-4574-aab7-5d8eaf816b32/automatic_control_systems_nise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b8092e-027b-4951-a89d-736d580eef67/whats_the_best_way_to_cook_chicken_in_an_air_fryer.pdfIn PDF document text
    • http://mizelabe.pbworks.com/w/file/fetch/144908136/xezivofugexelisivoxesa.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144875874/6734546988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d6054c-a288-46d0-8655-f3fc2f0c2c9f/jasipegozenirolinavefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb8be44-dd94-4a89-8eb6-b9613cf426f1/what_does_industrial_designer_do.pdfIn PDF document text
    • http://zexowisam.pbworks.com/f/9_snf_almanca_kitab_cevap_anahtar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dca792b-50e9-49ed-b72a-ebbc630ace83/whats_the_lucifer_effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076ed252-be32-4b84-82a4-4f927a89cccb/how_to_remove_a_stannah_stairlift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bc41cc-50f5-415c-8555-e57b5a2f5840/xagibos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65247756-0123-4748-a763-1935cffde654/69402445544.pdfIn PDF document text
    • http://ruzezotep.pbworks.com/w/file/fetch/144868644/53176723837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6492a3f-8d31-4460-ab12-bf8d8cbc75a3/what_is_the_newest_50_shades_of_grey_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9488344-f509-4ecf-a25f-f7dac9923f2d/pelicula_en_el_tiempo_de_las_mariposas_analisis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c732ec5f-f32c-4451-8caa-4ef6ec9ea888/theories_used_in_nursing_research_on_smoking_cessation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eae29b4-807a-4fd6-9827-5e124249d6d2/wetotixog.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_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 5964 bytes
SHA-256: ed0a996f01d0736d4cefce732693a05f99b84d96bc2c07e309ddd3380f26953a
font_01_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 10296 bytes
SHA-256: 84cda9b56d901a02a086511ad472db35f89e6c95dfbea101d75452fca367a0e9

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