Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2ede7173ecf6cc…

MALICIOUS

PDF

74.7 KB Created: 2021-03-03 12:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb48bcda30b8962f455c27ac3cc8d7fa SHA-1: 867eb3b832b1a35ebd8a3652ccbda0e54476afc8 SHA-256: 2b2ede7173ecf6ccb1f4ad33490176807a2ad61e550a38bfcbf59998c0d68937
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link farm on disposable hosting. The document contains numerous external links pointing to various PDF files hosted on what appear to be SEO-optimized or disposable domains. This pattern suggests an attempt to redirect users to potentially malicious content, such as phishing pages or malware downloaders, under the guise of legitimate-looking documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=social+constructivist+theory+vygotsky PDF link annotation
    • http://rostov-mobile-doctor.ru/xolonilizozumirewexix7x8mr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_6015b727f144b.pdfIn PDF document text
    • https://cdn.sqhk.co/paxabuxutujo/9ihWH6W/making_pottery_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414164/normal_5fd06025e7174.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/bewogoxub-livozin-kovivesemiwi-zuzoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_601edd78c3b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5ff51a445aff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_5fe64c3bc897c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_600c45418a785.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/f37dad3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_60242a9401090.pdfIn PDF document text
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/6241103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489839/normal_60049fdee7364.pdfIn PDF document text
    • http://luvatok.66ghz.com/music_arranger_software_free.pdfIn PDF document text
    • http://feedbacrnz.space/85318635845nn6i6.pdfIn PDF document text
    • http://price-list.moscow/medical_hematology_bookpilfk.pdfIn PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/gaxanan_xijafutawababe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vugupopoji.epizy.com/59484513567.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_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 5392 bytes
SHA-256: 4c06d922f4bf8fb0168f271fb58b2598c3c47383a893b172e5ba160fdcdd109f
font_01_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 9860 bytes
SHA-256: bc671baa98cceca1155753bca7686ade4a531eb24c028b564c3a3f5e3882e461

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