Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f69666835ede2ec…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 13:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bd1399d5f41cd145f7ab889835b257f4 SHA-1: 87c1f1a6e5fac29d8cf9782ca47d12dfbbb040f3 SHA-256: 5f69666835ede2ecbbbaa0cf6f4bf9bc0e4bab7e1b524f0872b5072ee772cd77
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://maypoin.ru/strik?utm_term=unity+definition+in+floral+design' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=unity+definition+in+floral+design PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5fe224a38dc40.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/bixenitavadebukenixo.pdfIn PDF document text
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/saxedon.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/sulobu.pdfIn PDF document text
    • https://mibonapa.weebly.com/uploads/1/3/4/3/134308174/jeseba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_5fdd355ea29bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd155b16f486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_5fe7ecfc76654.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/dexeteparaminakuveda.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/semepemupojufidominokut.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/ralubemux.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/5645011472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_6031bae970584.pdfIn PDF document text
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/kudutimun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fe75e99e6228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_600bd6b3bc2b5.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/how_gm_diet_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_60064966e0186.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/zefuditule_juviwamus.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/vipuxafol/fubexifuni.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/most_hardest_riddles_and_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_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 5168 bytes
SHA-256: 89f56cfd75fe3d00528768e25670f02a1cac0dfe85fcd733ab6a94c19227896b
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 10640 bytes
SHA-256: 04df2959203c8be1db2efba92fa2340f51f65c09123db3997438419641fb4b85

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