Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8072743d9f8a0a…

MALICIOUS

PDF

43.2 KB Created: 2020-10-04 07:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 93639c3d9866492ee3a8f88648e29b92 SHA-1: 6d0af4c8155f1277b8b1a2123c3130e95304f35c SHA-256: 0d8072743d9f8a0a7c6368c2aacacd1340d65d524c4928367a8894cf6e16fae3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=medical+certificate+format+sick+leave+pdf In PDF document text
    • https://site-1038901.mozfiles.com/files/1038901/fibewilelem.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/falixujavegupiratedikiwen.pdfIn PDF document text
    • https://site-1038952.mozfiles.com/files/1038952/nupisu.pdfIn PDF document text
    • https://site-1043532.mozfiles.com/files/1043532/vabudowomusefutadutumup.pdfIn PDF document text
    • http://files.edgingtonroaddistrict.org/uploads/1/3/0/9/130969580/9418611.pdfIn PDF document text
    • http://files.kimberlydeanne.com/uploads/1/3/0/8/130814676/kabotenimum_nojibas.pdfIn PDF document text
    • http://tadulupak.mdihslibrary.net/uploads/1/3/1/3/131380284/8525730.pdfIn PDF document text
    • http://lagijoj.hhwplus.shop/uploads/1/3/0/8/130814408/e9380446a12.pdfIn PDF document text
    • http://tobixi.coloradorootzmarket.com/uploads/1/3/1/3/131398164/7729223.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/ce38b0bc-8d4f-453f-8d1b-782d74b6ba73/tamaruxobotedaxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c982ded3-9f3c-4dc0-906a-f09aacfda2c8/sakamizadasimizox.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_off00006a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7E 5428 bytes
SHA-256: 11a92a862f75d8ef69aa353561b6a2e0f00c030c02901ce788ffe9b4731956ea
font_01_sfnt_off00007cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 10328 bytes
SHA-256: 296a5cbccfddadd2f115ab514cbb7f59b08baae995f34ab3797ec58c10f75864