Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eac0045bf4949f7…

MALICIOUS

PDF

79.1 KB Created: 2021-06-01 23:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ddd4f678870271a83f476bfa4ec525c5 SHA-1: b3f6c054d228e57c5a25951dfd954733ed275f48 SHA-256: 4eac0045bf4949f73e872b04584dc02feb2c4707cba8967341317c2fdd0e5659
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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/123?utm_term=holt+mainsheet+swivel+centre+jammer PDF link annotation
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/dogudifofe.pdfIn PDF document text
    • https://renokiva.weebly.com/uploads/1/3/4/3/134353994/499143c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fdb1b3d65d92.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/6759986.pdfIn PDF document text
    • https://rikutokamalaru.weebly.com/uploads/1/3/4/3/134319242/518df6e334a2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601d60511eb14.pdfIn PDF document text
    • https://vavemome.weebly.com/uploads/1/3/4/6/134609594/bijegasir_jadawodagib_makebijufazozez.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/rurinor-nuxigezaguk-gitapopomi.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/9088549.pdfIn PDF document text
    • https://jisevudes.weebly.com/uploads/1/3/4/8/134882916/vowazefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_6031e22200712.pdfIn PDF document text
    • https://bajevopado.weebly.com/uploads/1/3/4/4/134456845/88fc5f9.pdfIn PDF document text
    • https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/7902666.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
    • http://gazumadu.pbworks.com/f/who_is_the_oldest_titan_in_greek_mythology.pdfIn PDF document text
    • http://xofitesu.pbworks.com/f/99645632965.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/23347871214.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/f/malerafu.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/figodaronu.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144440181/79916295691.pdfIn PDF document text
    • http://vosebim.pbworks.com/w/file/fetch/144452907/is_mc_java_edition_free.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/f/65031019189.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_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 5016 bytes
SHA-256: 3c013f33e273e4c0abd70795278c158557fd28a76d65cc8c8d06bcc498d8ecf6
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 11564 bytes
SHA-256: a38bddd7b4064c8c97c649f7df0288d493334d7ec0c21a7405ce41b315ca294d
font_02_sfnt_off00012075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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