Malicious PDF — malware analysis report

Static analysis result for SHA-256 c074333bf38acff4…

MALICIOUS

PDF

42.7 KB Created: 2020-10-14 06:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b5a9f0defbb9c95880efb41c5821924f SHA-1: 3067f229d088d2430dc73afe254a72b567862203 SHA-256: c074333bf38acff447bc5b02b9772cc1c99a3f5fb04496f193e80d42ed38afb3
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/strik?keyword=peter+lynch+learn+to+earn+pdf+free In PDF document text
    • https://site-1043601.mozfiles.com/files/1043601/42126329367.pdfIn PDF document text
    • https://site-1041085.mozfiles.com/files/1041085/61053754555.pdfIn PDF document text
    • https://site-1041281.mozfiles.com/files/1041281/15707011020.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/72186774479.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/2993226677.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.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/157d571f-3f44-4704-9c95-c47867428918/65269776989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c413743d-eca5-4446-9db2-3d0b1040178f/65602495387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9956082-f5d8-4442-8677-f07eee8a7bda/xababusan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e079d43-1f84-4a58-8184-8f474ab9c28a/42926394549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c598439-9eb0-4e4f-b261-03545f08260c/44296851277.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_off000069a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 5168 bytes
SHA-256: 55e85c0c57a80d4006cf2263914d98d2af87daddd2aac94b51ffe1746aec7883
font_01_sfnt_off00007b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B33 10252 bytes
SHA-256: 51082d14494e8751ea36c9384c749f2a54179b344a449ae447b16662ef8cfacf

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