Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c2d13a519033bb…

MALICIOUS

PDF

39.9 KB Created: 2020-11-06 19:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 63e167893887e6f0e921c875fb26c044 SHA-1: e1847cb670a7989ef87883fd91786d4629b3ca40 SHA-256: 58c2d13a519033bbd9c278a864d2af88db20090fdaac665afbcc7054387c68bd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=admission+requirements+auburn PDF link annotation
    • https://kulinamolusamu.weebly.com/uploads/1/3/4/2/134234583/bivodeferuva_wodadalole_zomijo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetazino/gekirum.pdfIn PDF document text
    • https://winomosefari.files.wordpress.com/2020/11/tewupe.pdfIn PDF document text
    • https://dijoxano.files.wordpress.com/2020/11/29071317762.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://fuxuvonif.files.wordpress.com/2020/11/zodaxikewejejegupinuro.pdfIn PDF document text
    • https://kepajeji.files.wordpress.com/2020/11/nijogunedeluveritoj.pdfIn PDF document text
    • https://robedekoza.files.wordpress.com/2020/11/41703728180.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://minezonateta.files.wordpress.com/2020/11/71909694747.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_off00005b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7E 5192 bytes
SHA-256: 2add0c3e3e8987dd40799a027a19b36ec21d373c15854a535fc0a4f9d3caf494
font_01_sfnt_off00006d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 11428 bytes
SHA-256: 70251dec00b742eefe7dffe3b127b39c25be469359e3ee1117d1295950c01a7c