Malicious PDF — malware analysis report

Static analysis result for SHA-256 1935fb9db6eb06aa…

MALICIOUS

PDF

54.5 KB Created: 2020-10-27 20:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 869a2aa7494fb1a2139523ef4bea3feb SHA-1: 4417865e53485b0c08017f7c690cfbfac4d999dc SHA-256: 1935fb9db6eb06aa80af8c42a3609ff81974592543c16803acd88bb6b995ee72
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Asus ez flash 2'. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ttraff.link/123?keyword=asus+ez+flash+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f91c67281482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f984e0bc8fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8bffd47a2ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5f93f992a7fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f89a4e4e573b.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/8009924.pdfIn PDF document text
    • https://vaxonarug.weebly.com/uploads/1/3/4/3/134378521/navuwasop.pdfIn PDF document text
    • https://zewonawexekuke.weebly.com/uploads/1/3/4/3/134318694/6844981.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/43144ee6-f221-48b3-835c-5af1fcd523a8/2192419459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d0a56a-1003-45d3-8cd0-cfa614db176e/14503791190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a75a6-dedc-4bc1-8a32-2ff4b40f2ded/fallout_nv_sex_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e131bb-f7cd-42bc-b319-af37ba48623b/vepofuben.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/bojifavenabosetalox.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/54981412522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3024/9131/files/xalozirulufibuneriduvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6637/1495/files/manual_de_usuario_onyx_studio_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/jufujakotibafesiwuvuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8147/5267/files/kevanusuxinemenodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/watercolor_artist_magazine_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/brave_new_world_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/calisthenics_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/34486261807.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/65473920988.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_off000092af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AF 4928 bytes
SHA-256: 36cdcb45b6fde26964c21fc377766aced38ccc5f048ffb7903715caa874341ea
font_01_sfnt_off0000a376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA376 12052 bytes
SHA-256: 2aaac668fbd59717242d8f7bf77554f639bd1cc3eb4dbb3069343663c795cf22

Open this report in the interactive analyzer, or submit your own file for analysis.