Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a320740e18fd3e8…

MALICIOUS

PDF

67.4 KB Created: 2021-02-07 19:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5bacc4e7a07af773e662d9bdd5b599ba SHA-1: 0e8f90575ff975bb9b87e7d6c663c397c79f6257 SHA-256: 5a320740e18fd3e818eb48e888394dfd6557ffd4a4ab86845bb1c6c535e1d8b9
186 Risk Score

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://maypoin.ru/wb?keyword=hexcel%20honeycomb%20design%20guide PDF link annotation
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/5848211.pdfIn PDF document text
    • https://goguzosuv.weebly.com/uploads/1/3/5/3/135343726/4dbaaecb.pdfIn PDF document text
    • https://fefolidagemilo.weebly.com/uploads/1/3/1/4/131453124/54a77.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/pavoza.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/juwajofusoxa.pdfIn PDF document text
    • https://divewamekavese.weebly.com/uploads/1/3/1/8/131860060/jukasitodexazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_60049a6c14639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_601b4404be291.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/34b86b5bf80.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/musozemis.pdfIn PDF document text
    • http://bemelegevew.22web.org/butyl_formate_sds.pdfIn PDF document text
    • http://zotegomowivin.22web.org/addicted_2014_full_movie_free.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/sigobija/faxesiwikatobekup.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/didriksons_hat_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/guidepost_montessori_school_at_peoria.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_off0000c91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91C 5320 bytes
SHA-256: 54a7c7841f7e14986141db0643ffdf928fdad2dd31f8f9c875042ffc1bf25391
font_01_sfnt_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 11104 bytes
SHA-256: bbb49bffcaa099df6df6d38e8ce042d96af4b52f6c79b2a729adef0a2a63ddbb