Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe8d076db1f3161…

MALICIOUS

PDF

36.0 KB Created: 2020-11-08 23:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 10d6c5fc740e91c53c3e87c02225faab SHA-1: b7017ebf74057ef1e306c1deee96e422659d415e SHA-256: efe8d076db1f31619ce1ca14c3d85d6ed3731fce34dd730596d8315a5f007f00
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=unblocked+games+multilateadoll2+yappers PDF link annotation
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/978f1bce71.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/zisefawu-denoxum-bufulifof.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/9624065.pdfIn PDF document text
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/6276928.pdfIn PDF document text
    • https://terogoke.weebly.com/uploads/1/3/4/5/134587715/divudirowa.pdfIn PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/bc97f419803.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/gakusududovib_novolenozesamel_guvenekitunut.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/7859260.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ccafe6-cbe7-4c0a-92af-bec61206ee9e/94662833739.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4d38d9-2163-4c1b-ac25-7f5ee1a24c2e/umbrella_academy_comics.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/assembler_plusieurs_en_un_seul_en_ligne.pdfIn PDF document text
    • https://pusewekamavo.files.wordpress.com/2020/11/lugipuzisikikupuvepupe.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_off00004d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D92 5820 bytes
SHA-256: 0db2c36c92d5934bf4e665653076f086976542ee010c7982e2aefb0cd5f0c798
font_01_sfnt_off00006156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 9940 bytes
SHA-256: 99369941718c06e350d2632005b8e806a5f9ec47846a5e4b900f6d8900537d58

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