Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a354f4c033e31c…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 03:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5536f34179a71302834fd5f8e205cfbe SHA-1: ec6c1a78c54885a50da0a94692c9a12cae51985b SHA-256: 36a354f4c033e31c87896e39935850ae608f89640706eb258f941e2d73a9514f
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://maypoin.ru/award?keyword=fundamentos+de+algebra+lineal+larson+6+edicion+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459176/normal_600179612ea59.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/2e0a0d45ebf54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_60344c13d5a3b.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/cggVwJP/new_santali_ringtone_2019_ka.pdfIn PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/5871081.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/luzogugabujur.pdfIn PDF document text
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/nawuluzuf.pdfIn PDF document text
    • https://puwawegolawibot.weebly.com/uploads/1/3/2/6/132682739/2948090.pdfIn PDF document text
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/745365.pdfIn PDF document text
    • https://saworajopasu.weebly.com/uploads/1/3/0/7/130775294/3715496.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/iiekNSL/68324086721.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/hi8nlAH/youtube_vr_not_working_oculus.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/gdhehgR/22499525166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_5fd1b4f86101c.pdfIn PDF document text
    • https://fenazimo.weebly.com/uploads/1/3/4/4/134437137/godefozorigufigewa.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/901637.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/xiwevitox/muwebovoperuwuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/personajes_mas_importantes_de_estados_unidos.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_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 5724 bytes
SHA-256: ac6959ba65038b682bbc4ac6d6cc3c4d34d8efbe3fd76dbf835bad5403c04a21
font_01_sfnt_off0000e7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 11968 bytes
SHA-256: d767074298e42cee10d692a8d666b702ffe21e94e1e1d16bc7ee01fd280abadc

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