Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b78f70928a3eba2…

MALICIOUS

PDF

93.5 KB Created: 2021-03-20 09:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1e2fa227517b5fa7fb7eb151f9be6317 SHA-1: 0f0ee195aae66c146be3d7188d6320ef82a253fa SHA-256: 2b78f70928a3eba248a8b1aaccddf999c795183b56d7db300cc2e99d735c36b1
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm and embedded URLs suggests an attempt to redirect users to potentially harmful content or facilitate phishing. The document's structure and embedded links align with tactics used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=latest+current+affairs+in+english+pdf+2020 PDF link annotation
    • http://supariwepexafat.mywebcommunity.org/maxodasazudasado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601cfaf18d036.pdfIn PDF document text
    • https://fotinodonana.weebly.com/uploads/1/3/4/6/134692009/a237d219b473.pdfIn PDF document text
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/6815885.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/the_perfumed_garden_quotes.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/knowledge_based_error_example.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/2296018.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/3588212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5ff713d231e64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_c0f3740dff2b46728f2b2da559e74dde.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_bb407b88ae734038a331a5dd6752c64a.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_05d2b5653c034d16becdfad5183cd4c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/36129580273.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/demibuxilawap.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/xujuxuwo.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_49aa6091f83c409aa53bdc763ec15a64.pdf?index=trueIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_95a06be350454982b18f3c6c7f457b44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/fractions_word_problems_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/infrastructure_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/titoxinalinufesowomov.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/28453607479.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/2017_december_north_america_sat_answers.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_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 5632 bytes
SHA-256: 4829b64c55fc8eb7b84ff99c560035ec02647e46e42042cd1a3ef3491bcd388a
font_01_sfnt_off00013e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E77 11704 bytes
SHA-256: 84592bd66a271cc94c113c56bf55d04ea5561083e07f8539829a54a5d39c125d

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