Malicious PDF — malware analysis report

Static analysis result for SHA-256 899dfbdd2a7b0e42…

MALICIOUS

PDF

73.0 KB Created: 2021-02-11 19:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: da33a699485353e3f043418bcbab769b SHA-1: 9522a8da0117c4450ecba8fb93681e44c6d47f09 SHA-256: 899dfbdd2a7b0e420cd3d3f6989c2d8d7144be19d1da3709da1d620694ca2925
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=esl+contractions+worksheet+pdf PDF link annotation
    • https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/83c1539f2.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/3395847.pdfIn PDF document text
    • https://kogekotosejikol.weebly.com/uploads/1/3/5/4/135400664/bajesixol-derorelito-xizenevimonopet-sumojuz.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/7521320.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/3550e75d14bb.pdfIn PDF document text
    • https://bosagibanili.weebly.com/uploads/1/3/2/6/132682134/vebupelivaxafuzatofe.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/buvonofozab-kiduzedesesaj.pdfIn PDF document text
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/7d3e2ad88d.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/nudisakewezuzik.pdfIn PDF document text
    • https://puwibovur.weebly.com/uploads/1/3/4/6/134639487/rutivituj-pumagebisejil-sipusawedet.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/6683350.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/bmo_financial_group_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/la_cantatrice_chauve_rsum.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/jekebijukebiwevasa.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/61825208233.pdfIn PDF document text
    • http://marelifi.rf.gd/53619892275.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/sql_server_2012_licensing_quick_reference_guide.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_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 5356 bytes
SHA-256: de04fbdd74c3e0c5411b4919681ced8fc4cb37fd7c67752682c9992751cd27de
font_01_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 10444 bytes
SHA-256: 74e0ac8884b9b0aa704dc68688ce77d7ed3dad1ed2f82e577bfb2a83a44299ca

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