Malicious PDF — malware analysis report

Static analysis result for SHA-256 05732e57c5b122bf…

MALICIOUS

PDF

61.8 KB Created: 2020-10-23 00:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: e3d724043caba20df9377cc711858f89 SHA-1: 2332c73b111145e79f9415ba951132ea5d8de7f5 SHA-256: 05732e57c5b122bf304338488f87ad39134c1189afd2a5b7f4a0c4c6ef92df2e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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.me/123?keyword=hemodialisis+como+funciona+pdf In PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/vuduj.pdfIn PDF document text
    • https://buvusujekigipo.weebly.com/uploads/1/3/4/4/134453925/zulofab.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/5098696.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/zixekew.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/0ccba418f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5f905027c2824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87eebcab49e.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/c7379c36-78ee-4503-8256-1b6a69f5a57c/lewevupubisukajuweligate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e920170c-44a5-4199-85fa-1fed474d349e/bugiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4ba660-8855-4791-a861-fd9017d37c12/83058184425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2f463e-6d79-4b97-9808-4996e8ad247d/taforiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e78861-9825-458c-8d8b-63643e8afc0f/37975115959.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/56917380458.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/byzantine_empire_map_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/suvofofiweko.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/28434674048.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/35681815859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ac8ed-c442-4c50-8f3c-705404a7cad5/20939974719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286a2aa0-6543-43ce-a95f-230a304fa19d/tinosadevezifulitasigago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecb046f-1407-46e7-8450-668cc3e2d5fa/85577538243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bfdd65-6de3-4dae-94b9-3b3a09559146/didedofokij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5189442-8373-4e14-8565-f5e11d675c86/nafomupuxowusiwujogimuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/80183639543.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/chordata_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/eikon_basilike.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/broken_silence_natasha_preston_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/57539222151.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000c4e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC4E5 20824 bytes
SHA-256: f64395dc0bc0ec9ec36f4a53f9b62e19c6e5f9f10cb44d84c98f48fc4eed398e
font_00_sfnt_off00008e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 5168 bytes
SHA-256: 24dd537158bd4ee601a8026958b1217ad7834c58cd79e0b3d1adbc504c40d97c
font_01_sfnt_off00009fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC7 11332 bytes
SHA-256: ed61431b2c90eae4c289f38b0bd77b06f1ffe4deb577b1e7894d99be8561c65a