Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e63ad16173820…

MALICIOUS

PDF

81.9 KB Created: 2021-04-27 10:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0c714ebca9b3475618ead71c052f652d SHA-1: 43a713ff9ced9a5f7e616d0f01ab81fe695a442b SHA-256: ea0e63ad16173820752c44daa6c30746f8901769c869b7c0f4cfbf849eda8400
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for unrelated topics. One prominent external URI, 'https://zajinet.ru/strik?utm_term=samsung+tv+un40eh5300+wont+connect+to+internet', suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/strik?utm_term=samsung+tv+un40eh5300+wont+connect+to+internet PDF link annotation
    • https://mikutefax.weebly.com/uploads/1/3/4/8/134866710/2758d432da5ac9b.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/60263164924.pdfIn PDF document text
    • https://gijejutet.weebly.com/uploads/1/3/5/9/135974865/gutirositenuwi.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/72159457773.pdfIn PDF document text
    • https://tilinonulubun.weebly.com/uploads/1/3/4/6/134614078/fuzomu-lofinegerut-vesafusaguziti.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/career_guidance_after_10th_free_download.pdfIn PDF document text
    • http://wixiziz.iblogger.org/ielts_listening_book_5_test_4_answers.pdfIn PDF document text
    • http://gopururin.iblogger.org/bobol_wifi_lewat_android_tanpa_aplikasi.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/61dfeca0-a5c9-413f-9ced-e54b3ffb3fb1/55344342444.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/mefuxobi.pdfIn PDF document text
    • http://xigokabuwawi.epizy.com/82742545856.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/21549073563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcd6b5e-4c54-4e31-85ce-0b1cfbb015b3/63231094833.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/is_the_g_shock_5081_waterproof.pdfIn PDF document text
    • http://benijumenulizu.rf.gd/data_communication_and_networking_free_download_tutorialspoint.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/19720516689.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/16901714640.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/picadura_por_araa_viuda_negra.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/pejusafomalowul.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/jeppesen_instrument_commercial_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62940636-b8f1-4ef5-9ca3-da5122d55406/what_battery_does_a_bulova_watch_take.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_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 5952 bytes
SHA-256: 07fb40e7fc0685c1de3668db85a977e0fbcec45ff1474d70f38c9e9f50ec3b27
font_01_sfnt_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 10872 bytes
SHA-256: 34f3efb4240ab6328bc24ef5dae541f3a380ce023a6f939771539433f98b75f1

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