Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d92f76cf3a8add…

MALICIOUS

PDF

79.9 KB Created: 2021-05-25 06:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 66867319483c4798dd4640356e7eb2b3 SHA-1: 576d55521377332164368ca66d71f42ed7d0b9f8 SHA-256: d1d92f76cf3a8add00903e958c995814de9936d8cd5c9ff1c022cb30085b123c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicative of a link farm. The primary URL, 'https://dugedepap.ru/strik?utm_term=the+core+competence+of+the+corporation', suggests a potential phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links are strongly associated with malicious campaigns, often involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=the+core+competence+of+the+corporation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465701/normal_600c6ca2e4cb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fce6bd2dfd68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_60168d21ebed7.pdfIn PDF document text
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/4eb2683be684c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_6010d30294fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd7d7f967f53.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/466899.pdfIn PDF document text
    • https://kiwogadewabinox.weebly.com/uploads/1/3/4/0/134017617/jilasetodasir.pdfIn PDF document text
    • https://lepujipalojim.weebly.com/uploads/1/3/4/5/134599636/d0db3fcad2.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/e1a5e35625eb29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470391/normal_5fffc6fc2d540.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/1828079.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/suregip_xejibipap_xesodekuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483103/normal_5fcb22ab7a29a.pdfIn PDF document text
    • https://fiwitoritare.weebly.com/uploads/1/3/4/5/134582968/sizoliluda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_603fbd2ca3e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2e9edafa23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5fd651dd171eb.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/db09da0a-c9e6-4341-b064-d44724b23a5f/mapiviwewupigoxuxiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38949aa8-6dc2-4f43-95f8-badb1d4a4086/paris_regional_medical_center_family_clinic.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/how_to_adjust_the_water_temp_on_a_kohler_shower.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/film_bioskop_indonesia_preman_pensiun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5186496-ac58-4e8c-93ba-d1bb8d287fde/mixozoxikilemezatokipe.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/68870517007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfbbbb0-82a0-4f66-b89b-86907fd0b75d/runesifepawunekoberetewa.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_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 4992 bytes
SHA-256: 2f58b531eea141b8cb7e946c2340508e0caef13050df5ced45b802403db82370
font_01_sfnt_off00010b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B63 11436 bytes
SHA-256: 39335ebd9f0f92ab4b354e30a67975e07b1bad42a8dbdd41da5e870215f4afe1

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