Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bbf2eefc295ac1…

MALICIOUS

PDF

47.6 KB Created: 2020-10-01 18:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 41038aa8f555e56f15e08c8986e9984a SHA-1: ff9a1080d948426819374e98c4252b5f6f80c2a0 SHA-256: d6bbf2eefc295ac186dfc7376f77dfdb53322a6ab0a6e53a587c4e9c4c0bb0bb
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://gettraff.ru/strik?keyword=metal+cutting+and+machine+tools+book+pdf In PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/nevumofixekaxiro.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/fotaxabe.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/45668490220.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/popik.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/40370617515.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/nolegufofunojuradatofawat.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/97772012217.pdfIn PDF document text
    • http://files.sallycasey.com/uploads/1/3/1/4/131405958/6372e52a0b3225.pdfIn PDF document text
    • http://danabitom.tribechrist.com/uploads/1/3/0/9/130969742/xofogemawoje.pdfIn PDF document text
    • http://lujogino.kidneycarecleveland.com/uploads/1/3/1/4/131453648/f0b8c708546.pdfIn PDF document text
    • http://files.butterflywithabombproductions.com/uploads/1/3/1/4/131437464/418045.pdfIn PDF document text
    • http://labimoge.aiasillinois.com/uploads/1/3/1/3/131380344/971448.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/e2ea00e9-57ba-4363-8c3e-4ef173555fd7/90508865866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc4c117-d44b-46cc-a765-fee4e1fe6c56/suwakonuxujagibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d061ece-76b6-4fee-b150-7be51b0ff2d2/68463529619.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_off00007ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC6 5684 bytes
SHA-256: e504700a2aa6ab61dbebc1ce1be27f871a7c8e30caa03f37c0d1d3ec3c7ed264
font_01_sfnt_off00008e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0B 10440 bytes
SHA-256: 51318a59525eafac47792808ef8f44cdd6a77e735f2ea00c9b53de4c5d975e8c

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