Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f740c82143efdd…

MALICIOUS

PDF

72.5 KB Created: 2021-02-12 21:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ea3548643bca3b8a5641541285f6be5d SHA-1: 30b675719c70b05af9781e8d1c30e1b8601f2060 SHA-256: 45f740c82143efdd9d15a7873c077d27a76c4782ba3b23a77ac1f84519060ede
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://druttle.ru/wix?keyword=numbers+after+one+hundred+trillion PDF link annotation
    • http://lodorobirat.22web.org/luzowabozobobixumuxek.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/nepagoveb-xexofupuwifek.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jljjgh9/20874258188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_6026448a732ab.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/3957036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373248/normal_5fcd5fb962166.pdfIn PDF document text
    • https://lepudumewo.weebly.com/uploads/1/3/5/9/135962044/08349ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_60212796e4f5c.pdfIn PDF document text
    • https://miruvogix.weebly.com/uploads/1/3/1/4/131408245/7d370d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6014414c1be60.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/jhigJFC/mft_challenge_disc_2._0_bluetooth_youtube.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/598640.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/kozebuzedu.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/e4a2ae1e34d72c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konewumabujak.rf.gd/5_paragraph_essay_about_school_uniforms.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/toxoplasmosis_and_pregnancy.pdfIn PDF document text
    • http://lunurubu.rf.gd/25871833800.pdfIn PDF document text
    • http://midotujeg.rf.gd/adblock_free_windows_10.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_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 5256 bytes
SHA-256: 3e1ac2e065d448fd9bf7b87e36bd6cfb121a55614eea6c0130d88e0c867533cd
font_01_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 10320 bytes
SHA-256: 6f3e5dc9d7fd4b15b20ae6b8fb4b0526ed81ecd5d6a329fba2b361b28d4f8b8b

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