Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34bdee202263acc…

MALICIOUS

PDF

45.4 KB Created: 2020-10-10 17:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8141097dfdb8d493aca23b7633177fbb SHA-1: 0ba32f72af457623845da320c812445c5a1bbb8a SHA-256: b34bdee202263accfc96a79707b400cdef73c6c70f6524aac3072a61decf71cb
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://cctraff.ru/strik?keyword=secret+garden+study+guide+free In PDF document text
    • https://site-1048208.mozfiles.com/files/1048208/85635144797.pdfIn PDF document text
    • https://site-1042976.mozfiles.com/files/1042976/bodekugepoji.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/xojezolas.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/52454741285.pdfIn PDF document text
    • https://site-1039183.mozfiles.com/files/1039183/kujosugule.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/pakuzixojawekufisi.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/xepixusevo.pdfIn PDF document text
    • http://lusok.strongholdequineequipment.com/uploads/1/3/1/0/131070381/1413843.pdfIn PDF document text
    • http://files.iluvmemore.com/uploads/1/3/2/3/132302815/ea158.pdfIn PDF document text
    • https://site-1044291.mozfiles.com/files/1044291/filujifomovizowewumuru.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/nevilejizotopeziwirow.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/54607975997.pdfIn PDF document text
    • https://site-1038852.mozfiles.com/files/1038852/58517961116.pdfIn PDF document text
    • https://site-1038432.mozfiles.com/files/1038432/21019655263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000073cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 5364 bytes
SHA-256: 597800751c7896608a9e20903ebcfe5616fc24a04b4152006091a9793c7007ee
font_01_sfnt_off0000861a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861A 10052 bytes
SHA-256: 277d518b9135050d20ab48c6c4babf748cb2ea3e8a0a3e6ab147ffa7dc58a1f0