Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd83b51c5c7b90a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 02:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6294b93b5784c46f3eca184df0ecc93c SHA-1: ff28f8252126b9e9f97aed2776bd87a741f6c58f SHA-256: ffd83b51c5c7b90a3dfaf138efedffd5908091aab0620d592de838725ec72650
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body and embedded artifacts suggest a lure related to 'unblocked games' which redirects to the malicious URL https://vilenefex.ru/wix?keyword=unblocked+games+search+engine. This URL is likely used to host phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=unblocked+games+search+engine PDF link annotation
    • http://penageli.getenjoyment.net/the_american_scholar_ralph_waldo_emerson.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/apixaban_versus_warfarin_in_patients_with_atrial_fibrillation.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/jvc_everio_battery_not_charging.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/fumisigapotapuxuz.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/xotebewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/772e0de5-6a34-42ed-8b1a-1aa220b11684/viliduzotajopi.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/canon_mg3222_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c2fd74-2b62-4880-8c4a-b7bb925a8b1f/pellon_wonder_under_805_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2052eae3-ceba-4894-aa90-2a053b8f7360/fogofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc91b91-c946-4fc1-9931-6a456652081e/usmle_step_1_sample_questions_2020_explanations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b860e4c-a86a-4050-8206-d193e690d8af/what_is_the_dash_diet_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/9178069018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c97581b-dcd0-44a7-8d06-e0cea7b94377/29895242636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1747cd-4b72-4a25-878a-8a9755154e41/95459774515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425cfbdb-9195-4bea-90ab-fdf7d9d9702f/gotusujanodebunetafuluva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619a2f1e-2d21-4a32-a502-71187bf2d62d/pokemon_fire_red_walkthrough_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e00ec96-2b1c-4b9d-bb33-808cb13ab624/kexonaga.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/61640260798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509a9a54-2103-4ac2-9d91-b0111b440e6b/zenuwisuduzodefonawawo.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/20998147753.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 5256 bytes
SHA-256: 8a0a6fe91f6c5b65bfe0e032f36f730836fdfed0446e817b85e98f853d793dfe
font_01_sfnt_off0000fd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 10384 bytes
SHA-256: 4ae2ed20ce59f6481cd8c9298617bcf9b2e5c8dec9f0d25405ea4d3e1af8883a
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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