Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05da9a1816533ea…

MALICIOUS

PDF

77.9 KB Created: 2021-05-30 21:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 75b76427efd499ee88945f40146e6657 SHA-1: e23595c6b1bd5560d0b261be7d4b48933fa1f320 SHA-256: e05da9a1816533ea92f2925837e8dcdcb5e852656e381a569459040c6960ae89
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing websites, as indicated by the ClamAV detection and ML classifier flagging it as malicious. The embedded URLs, such as https://seumenha.ru/123?utm_term=crystal+reports+totext+arguments, are likely used to distribute further payloads or lead to phishing pages. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/123?utm_term=crystal+reports+totext+arguments PDF link annotation
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/xewopepugo-giduduxazobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600b181c8f06f.pdfIn PDF document text
    • https://buvebozu.weebly.com/uploads/1/3/1/4/131453495/2403543.pdfIn PDF document text
    • https://getawotenag.weebly.com/uploads/1/3/4/4/134443600/depenadegarif-doronutod-weporukomukop.pdfIn PDF document text
    • https://bapiribudiwapik.weebly.com/uploads/1/3/4/8/134885568/gepal.pdfIn PDF document text
    • https://zuverefexogi.weebly.com/uploads/1/3/4/3/134316215/vuzurotatumuro-xinagozasaka-piwonafoxemok.pdfIn PDF document text
    • https://wifebazeb.weebly.com/uploads/1/3/1/4/131482826/8590044.pdfIn PDF document text
    • https://kumuxabe.weebly.com/uploads/1/3/4/6/134670594/6eb79be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_601af87aab21f.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/bigadafupod_zivafesujegovi_zunilirukofemox_satike.pdfIn PDF document text
    • https://pelifofenap.weebly.com/uploads/1/3/3/9/133997555/8053538.pdfIn PDF document text
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/loxowuwubirow.pdfIn PDF document text
    • https://gabopubowiton.weebly.com/uploads/1/3/4/5/134596717/58f3d8b5853.pdfIn PDF document text
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/b11c26af58ddec.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/wilipu-felezozetisiwog-fapoduvuxaveruz-mepigedal.pdfIn PDF document text
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/runavarufamiripi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6060b9c80f880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5ff0f3adf2662.pdfIn PDF document text
    • https://kipunelikerave.weebly.com/uploads/1/3/0/9/130969086/duzoj_jozen.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/63391.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/a6259f82-b6e8-4030-9cef-0826f5a6b816/the_norton_anthology_of_english_literature_7th_edition_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa06310-0906-4f24-bd44-76997c5ae8fc/what_is_the_message_of_the_book_of_john.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc7303e-4d09-412d-8820-1135235d7a34/the_ministers_black_veil_literary_analysis_essay.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_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 5216 bytes
SHA-256: 6ce518d5a4e390e1973c9962c5510853daee3602ba69e824fac0f3ea49df5424
font_01_sfnt_off0001028e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 11436 bytes
SHA-256: 3be12af25a7e6a5a8e02e200a5b47de86c6e64a50051e1e572c2849283e28cfa

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