Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffc012012eb2602…

MALICIOUS

PDF

83.5 KB Created: 2021-03-18 12:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e87a889bed00a86073d89adbd7a72acb SHA-1: 32d4996e3e7b7e1a48779b3286e7857e371f42a1 SHA-256: 8ffc012012eb2602bdfc7742aedbbebecee48338659adfc7ae284b3e804849cc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain associated with search terms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to host and present these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jottigo.ru/award?keyword=solapur+university+result+2020+b.+com+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369503/normal_6052b7a8af8c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_6015463e9f6b3.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/rebugozedebojine.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/2014088111.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/jufutifepekidew.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/riromonuxumukapawoxoso.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/gudasurewepometakazaxep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_60150d5b36d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_5fc9c2b2e7e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_60146fa764e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fd686bad403e.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://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_0ee7340a8ff94f2081eedf26b286587b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e78dd3-3758-4dc3-8a5b-bd4709a328f2/ver_en_el_nombre_de_la_rosa_online_castellano.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_8321ed9a254647a288012cb760a0b96a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a237cade-0181-4410-8b13-c9db924311f0/momezipovegibujivo.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_fdc1f3a35fa54314ae982862ccbc5306.pdf?index=trueIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/somabowodulikimer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec25cdd-9fdb-4204-bf9b-a090efb72b4b/48777471636.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/mophie_user_manual.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_66e4ea75bda749f6b59df73e8ca402ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a64244-73ca-4a02-8f21-cde6bbe4137f/64995680120.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_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 5896 bytes
SHA-256: 7fdeec20815e1400ffb41293adee7f9e8a3c0ab1eab28868e63cea2e5acba829
font_01_sfnt_off00010c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C78 10688 bytes
SHA-256: 3be8055284755c4e2064b21098f36228fdb9501978acbaef422bd305028469bb
font_02_sfnt_off000130c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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