Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72dd3979e9edaa9…

MALICIOUS

PDF

77.4 KB Created: 2021-03-01 05:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4ba12e3fef9d83d0c231a7ce716f9633 SHA-1: 26602cc604723914c0d4f79cb57e018c4729e654 SHA-256: c72dd3979e9edaa9d851474171740e629301d2eb42e8935c024a94c8e369baa0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/award?keyword=que+son+numerales+determinantes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413975/normal_5fdf2d7beacd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455645/normal_60365e7dee4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_60368d8a3201d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5fd128a06d8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_601aef6e455f4.pdfIn PDF document text
    • http://instapriz24.site/buck_converter_circuit064u3.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/zenenija.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/43fb9398d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_601e96dbabcfb.pdfIn PDF document text
    • https://lesaletalakiwop.weebly.com/uploads/1/3/1/3/131379456/zuxoreguzil_nedebekusaze_saretejekaz.pdfIn PDF document text
    • http://guxesux.22web.org/11893184341.pdfIn PDF document text
    • https://judemitipiru.weebly.com/uploads/1/3/4/3/134388438/2311019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5fd77b6f342d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_60146f7eb6c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd9882917f20.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/4590054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petojijoxura.onlinewebshop.net/sundance_optima_850_manual.pdfIn PDF document text
    • http://bipaxoxibiva.rf.gd/nonprofit_organization_business_plan_template_free.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_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 5032 bytes
SHA-256: 336f7eb297efbef8a1e879d51fd61e12c621b9610a90ded326c7b1f8065227d3
font_01_sfnt_off0001006d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 11884 bytes
SHA-256: 9b334e01467a277ef64aac692930933cfd1b0bc0a1c60f8b237f282449e792bd

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