Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead5870ff0bd0b5e…

MALICIOUS

PDF

44.9 KB Created: 2020-10-09 03:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3c66ae4ed6a5e3056cd89c0bee4048b7 SHA-1: b08db90a21f66cb833daee5822eb29fadb3aafd1 SHA-256: ead5870ff0bd0b5e473b75c67f5e73a18843d3c975107e218e95cfbdde57e784
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://ggtraff.ru/strik?keyword=snapwords+letters+download In PDF document text
    • http://pugowiga.elementfloorco.com/uploads/1/3/1/4/131437683/3640395.pdfIn PDF document text
    • http://files.allfreecomics.com/uploads/1/3/2/6/132683292/regenikig-rosilipokixigi-punidov-sogurudujijivi.pdfIn PDF document text
    • http://files.majormedicalproducts.com/uploads/1/3/0/7/130775373/5519264.pdfIn PDF document text
    • https://site-1040602.mozfiles.com/files/1040602/34566925951.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/rezitozuboxaweloxor.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/66805187748.pdfIn PDF document text
    • https://site-1040278.mozfiles.com/files/1040278/71557279998.pdfIn PDF document text
    • https://site-1041075.mozfiles.com/files/1041075/85132298765.pdfIn PDF document text
    • https://site-1040780.mozfiles.com/files/1040780/diwizifufadedaneka.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/41310400611.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/48969265165.pdfIn PDF document text
    • https://site-1040613.mozfiles.com/files/1040613/lovoletowobup.pdfIn PDF document text
    • https://site-1039863.mozfiles.com/files/1039863/72678858853.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/f50d3477-8b04-497a-8ee4-75e2523c4e00/22507594059.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_off00007023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7023 5148 bytes
SHA-256: 2fded13d61808c529d455cf3e66b1e650e20f5c80e6bdf11b94ade788cdc8ec9
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 10792 bytes
SHA-256: 0ab443f4ff24bf7eb68c7f5df85e6ddc3bd42af51628b206ef49bb38ca653272

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