Malicious PDF — malware analysis report

Static analysis result for SHA-256 93788ceb53945fc5…

MALICIOUS

PDF

68.1 KB Created: 2021-02-12 09:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 37cf0d796a51fa8be86d9632bf44656b SHA-1: cb3e0bea41279c9fbe4e1e45652ac44e5d360175 SHA-256: 93788ceb53945fc5e6982611b999be02503d33db4987cb2603c4902366ec84b2
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/wix?keyword=evolution+unit+review+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5feceeef7ffac.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/nejiveroledokid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fd2da19b19d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_600bf08d7a012.pdfIn PDF document text
    • https://liruviwogaralo.weebly.com/uploads/1/3/0/7/130776788/xugesasikagapifunot.pdfIn PDF document text
    • https://tamejozapana.weebly.com/uploads/1/3/2/8/132814544/wofefoxujukesogideb.pdfIn PDF document text
    • https://zuzilumapodebaj.weebly.com/uploads/1/3/1/3/131382406/9690030.pdfIn PDF document text
    • http://businessmentality.com/560768447347nceb.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/tuzafosakuwuzef.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/cc0cf7.pdfIn PDF document text
    • http://all-host.site/wapking_movie_2015_hd_bollywood5ejvj.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/gizitol.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/zoxewudunigus/ciclo_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/air_force_x_group_model_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/mazavobinadamumo.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_off0000cfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 4948 bytes
SHA-256: 3ae6ef73cee6dbf5206538e33cf9ccc2227e049fff96e6a351dad3562d7b21d6
font_01_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 10420 bytes
SHA-256: 7e1003fe5f0a5eb86719d5a6070fbcad51bfd1d9d03bbd7bfe31e8250a921673