Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a28410ec809b56…

MALICIOUS

PDF

72.5 KB Created: 2021-02-27 14:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f29d4f3ee081f77d40f7127ed043a1fb SHA-1: ff744f121cc5b2761c74c5a4466883ed3fdfc92f SHA-256: 65a28410ec809b56ecd9b5aca284b60ddc5502546d8a8f2041b34c8f70ab42d7
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://baarspo.ru/award?keyword=what+are+the+characteristics+of+a+computer+system PDF link annotation
    • https://cdn.sqhk.co/dibidoretu/ijZgjjc/neurotic_personality_disorder.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5fcc476571887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fda228171580.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/44820548431.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/ggAgeZd/18767739297.pdfIn PDF document text
    • http://mikapamaku.22web.org/elsevier_book_chapter_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd1c4208d941.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/yheOCja/animals_evolution_timeline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_603201dc8f3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_603682e5d4ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/nhghjMm/3627808066.pdfIn PDF document text
    • https://vepovadubit.weebly.com/uploads/1/3/2/6/132696500/gesixawufajofe.pdfIn PDF document text
    • https://tovimovu.weebly.com/uploads/1/3/0/9/130969206/6619369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5ffc31ce3a868.pdfIn PDF document text
    • https://gufurokis.weebly.com/uploads/1/3/1/4/131453316/ladumob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_60387c1eb11b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapirexazi.onlinewebshop.net/6871434347.pdfIn PDF document text
    • http://rinexaxar.rf.gd/avast_free_antivirus_baixaki.pdfIn PDF document text
    • http://towupew.epizy.com/barcode_label_maker_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_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 5336 bytes
SHA-256: 21f207036514fda6ad6f9de358d28324a78d5998252c6ad8af30d9c070a19119
font_01_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 10492 bytes
SHA-256: f1fa433d03a4b34e0c65ae5a99f3b6c00d12badba0d9bc4e87dbbd9a6e113166

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