Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fb8aedad900125…

MALICIOUS

PDF

42.0 KB Created: 2020-11-06 22:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 3ecbcdce22608f54a2c397491d7b45b7 SHA-1: 3159334daaa0ab273cd82f81b829268597dea2b8 SHA-256: 92fb8aedad900125a4ca17bbdcf0558ee9a50310d33f455241b247480434217b
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://traffking.ru/aws?keyword=echo+grass+trimmer+gt+225+manual In PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/5585190.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/719650c.pdfIn PDF document text
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/bevim.pdfIn PDF document text
    • https://jexedijelewa.weebly.com/uploads/1/3/4/5/134518212/kaxabed_milanupupinoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000063a4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000063a4.bin)
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://sexonilapaxo.files.wordpress.com/2020/11/1485368428.pdfIn PDF document text
    • https://rifuvusi.files.wordpress.com/2020/11/92418151704.pdfIn PDF document text
    • https://saxofenofam.files.wordpress.com/2020/11/id_checking_guide_free.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://wumuribar.files.wordpress.com/2020/11/rifudimifezipeberofotesi.pdfIn PDF document text
    • https://gokugilevipo.files.wordpress.com/2020/11/39682992450.pdfIn PDF document text
    • https://vixorujedujo.files.wordpress.com/2020/11/maxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926370cf-35c1-46a4-a1ec-7ce246fde307/87981649341.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.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 extracted file (font_00_sfnt_off000063a4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 5428 bytes
SHA-256: 9c9b4ba39ded8997e18bf034cd964e978cf3f36926767ea7fa3c446f2c65b1ea
font_01_sfnt_off000075fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FB 11608 bytes
SHA-256: 3d1289023d15852f6f0f55ef33d82893f40b66802cc058d50f05ff042ffcc68c