Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fed75d474aefc12…

MALICIOUS

PDF

42.6 KB Created: 2020-11-09 00:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 9f220350f3aca617f4b67b9922d9e273 SHA-1: deaa4636f7107811fdf06884ebcbf7da35c13b72 SHA-256: 4fed75d474aefc12b1d097318ff2394d1a3e02f167102e5d79c0a5b46a8cf9e9
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/123?keyword=to+build+a+fire+theme+essay In PDF document text
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/48689e11c4.pdfIn PDF document text
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/sitelo.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/2978201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://benobiv.files.wordpress.com/2020/11/dios_no_esta_muerto_descargar_mega.pdfIn PDF document text
    • https://regetus.files.wordpress.com/2020/11/mining_truck_2_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/actiontec_ecb2500c_moca_adapter.pdfIn PDF document text
    • https://jojifowasa.files.wordpress.com/2020/11/dosegaxitilofe.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/muchinga_adventures_ltd.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/samapumadodegeripod.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://dazodazi.files.wordpress.com/2020/11/python_beginner_exercises.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_off0000682c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 5340 bytes
SHA-256: 388d15357657063795a9768aad2547cd1fc03527807dd1e0fdc1ae4d69a01eb6
font_01_sfnt_off00007a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 10616 bytes
SHA-256: b6f26679024cce6507a8173aa3e4100b766c6f08af0c0535553bbd67dbf0b6c7