Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7530cc20f79caf…

MALICIOUS

PDF

61.2 KB Created: 2021-02-06 05:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2304e872c9da392f3720e9433603939c SHA-1: ba1419737336822daab17d3d3990883f711ad3f5 SHA-256: 5f7530cc20f79cafefa6530762fb831b621e423d91413abc66800db454102936
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jacksth.ru/aws?utm_term=avanset+vce+exam+simulator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd268cb2a21c.pdfIn PDF document text
    • http://merogerofame.66ghz.com/38747895755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fe87f5ad626a.pdfIn PDF document text
    • http://beweroxaku.66ghz.com/vutip.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/rixufevedaso-pitikedal-xolamigiwuzat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388067/normal_600821331528e.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/6395002.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvowafavij.epizy.com/40503920033.pdfIn PDF document text
    • http://muxopuwe.epizy.com/difference_of_cubes_examples_with_answers.pdfIn PDF document text
    • http://gepuxaxevo.rf.gd/dclg_appraisal_guide_data_book_2016.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/12493232430.pdfIn PDF document text
    • http://tarusuja.epizy.com/57140563045.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/uc_browser_for_windows_10_phone.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/5274826068.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/90686634757.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_off0000b5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BA 5064 bytes
SHA-256: 1ef6a205714d62d11651ab40fb9ab7c8ec44ada7449ab462c6874430ff1dc750
font_01_sfnt_off0000c6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E4 9712 bytes
SHA-256: d62afee7eed87296680fee86df55fd0b19773e1ec2751d068c49e672de9e4227