Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f5510dd95bac89…

MALICIOUS

PDF

41.7 KB Created: 2020-10-08 23:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4ada4ff84e909fa018d80927ddeee82f SHA-1: 531871ea5eb93762e41de4190667e872d3d63528 SHA-256: e5f5510dd95bac8943993ec02f6536cfaf365db8ea672b3e4b9488cc3fb868f8
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=nch+wavepad+serial+key In PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/31171114763.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/48252701525.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/52449387614.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/lomoladusulixokomotuzi.pdfIn PDF document text
    • https://site-1043770.mozfiles.com/files/1043770/49108986529.pdfIn PDF document text
    • http://banaf.irish-folk-songs.com/uploads/1/3/1/3/131381481/jarawuvamovum-kabatixe-dekabak.pdfIn PDF document text
    • http://files.txteencourt.com/uploads/1/3/1/4/131453130/balidudugafoxef.pdfIn PDF document text
    • http://files.mountainfresh.org/uploads/1/3/1/4/131455734/1632.pdfIn PDF document text
    • http://files.lucindaquilts.com/uploads/1/3/1/4/131438260/fejokusixevat_wameriziv.pdfIn PDF document text
    • http://wijejed.mike-check.com/uploads/1/3/0/8/130874050/2617448.pdfIn PDF document text
    • http://files.leniquecawelcome.com/uploads/1/3/1/3/131383657/zixonebuduw-fipiseg.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/15d1d8ce-a188-4384-b8af-780b28a367f6/jarumorofavilejitigezag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da86f464-f9bd-46f6-af62-7d7687778aca/nuginugomafumajolixak.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_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 5448 bytes
SHA-256: 9fcab6d5f21e3e0924862ad54bdc875f7a4db5ced70e857f88913d378c459bec
font_01_sfnt_off000076f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10360 bytes
SHA-256: abf5c2039348cac5bf46cae9e8d9c86828ec4465fd05e1a45d67d387d79df161