Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4d49c20ad1d379…

MALICIOUS

PDF

74.4 KB Created: 2021-02-13 20:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bab1356522e85768fa9a85e5186b1815 SHA-1: 7c9549cd4d8e99a985d0bb5b8aa9f5a5b1d3a49b SHA-256: bb4d49c20ad1d3795bf3773f9a45faaa0d4384471cac2ada10f166db2e574f09
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is 'https://baarspo.ru/123?utm_term=famous+north+carolina+musicians'. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=famous+north+carolina+musicians PDF link annotation
    • https://bevarari.weebly.com/uploads/1/3/0/7/130740456/tuburewukisak.pdfIn PDF document text
    • http://tovelksa.website/tesezanabafasuxisuzupometjyj2n.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/faxitifisexanijazej.pdfIn PDF document text
    • http://fullpisetc.ru/papomononcuvy.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/silebodafanipur.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/YhjDJet/lubusitaxakamunirukibexo.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/gjjeigN/trump_news_latest_today.pdfIn PDF document text
    • http://fridgeservice.ru/335943792147zkuy.pdfIn PDF document text
    • http://discount50it.pro/assetto_corsa_vr_performance4pxiy.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/mulegebuweg_burewafano.pdfIn PDF document text
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/josile_wutomi_potofekokaxuru.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
    • https://s3.amazonaws.com/tunenijexe/understanding_symbolic_logic_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/wemokemufitebosonabesot.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/atlanta_bread_company_catering_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/solajofomu.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_off0000dbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE5 4756 bytes
SHA-256: b5aea99248918d4143c7b791b2b82fc9922f8357a3c2f5e212c77a439d45edff
font_01_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 10052 bytes
SHA-256: e15cf40cc1841b771bb34cabb7fdaf9d05aa0c50ab4d4855ea062c0086af4073
font_02_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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