Malicious PDF — malware analysis report

Static analysis result for SHA-256 51978c114cd7295e…

MALICIOUS

PDF

80.8 KB Created: 2021-02-06 20:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 87f721ff3ef3cef4827ff57fb70bc7c8 SHA-1: d07b0afb03542618bf4c6c19f30af377797a7399 SHA-256: 51978c114cd7295e46042fdcd78543129f8e7803a42b5ab330e72ed9faee7a4a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/aws?utm_term=acceptance+and+commitment+therapy+metaphors+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366312/normal_5fc8f92415a3f.pdfIn PDF document text
    • http://littlenat.space/90704702512cukv3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5fc5d58f74e67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5feb638d4f5ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_601a49cbcd7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600a572abbc02.pdfIn PDF document text
    • http://dirtygirl.fun/cocubes_assessment_test_papers_with_answersy67wd.pdfIn PDF document text
    • http://pet-guru.shop/vifojakedomopepoxofapab5dxs0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutulatovemi.epizy.com/esma_guidelines_on_market_soundings.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/london_evening_standard_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/atelier_lydie_suelle_platinum_guide.pdfIn PDF document text
    • http://lisevazoni.rf.gd/solid_bhola_remix_song.pdfIn PDF document text
    • http://jogirizuxaxoban.epizy.com/36785423214.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/xosabodozesafonavi.pdfIn PDF document text
    • http://fefomuk.epizy.com/las_enterobacterias_son_coliformes.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_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 5456 bytes
SHA-256: be385a155484f80ea16e9970eb5ca05f51699c3cbad30186e3280a5d8f4fc867
font_01_sfnt_off000112e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 10280 bytes
SHA-256: 2dab34b566d994be40bad6cba01b677f63fa0825f2f3ededa029efeff5b350ba