Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efd51d549a572a0…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 09:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c01be1784f0e9776904b2e34a7fc3b48 SHA-1: d67ba5328004cba63fd600c39ace21ce40c5d73f SHA-256: 3efd51d549a572a0d104016e7fb7a2fec322cf53d1cbb57d9abcf0b322ac5188
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=samsung+series+5+5003+led+tv+48 PDF link annotation
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/lutovezakajetemejozi.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/1af27a.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/ratoluputezi.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/dii7qig/35715773023.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/balitowomiwifobo.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/e49278cb0c8f2c5.pdfIn PDF document text
    • https://cdn.sqhk.co/waderapal/ge6P3ha/linear_equations_in_one_variable_class_8.pdfIn PDF document text
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/roxubuwon.pdfIn PDF document text
    • https://ludubilataso.weebly.com/uploads/1/3/4/7/134719947/6404463.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/bjgQhih/10445305341.pdfIn PDF document text
    • https://berekimitavogi.weebly.com/uploads/1/3/1/4/131452750/bopabekodu_piwibudij.pdfIn PDF document text
    • https://salogisamokowo.weebly.com/uploads/1/3/4/6/134649366/maxenigo-manevuvuxufetot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxerulegud.epizy.com/52526839027.pdfIn PDF document text
    • http://jadufabusen.epizy.com/dewolovufazalaza.pdfIn PDF document text
    • http://vuruketunuwu.epizy.com/macclean_water_softener_parts.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_off0000dd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD29 6020 bytes
SHA-256: 134492975170ea30d1c765ccb81ab00de934dcd31f83e9d4a40893883634a26f
font_01_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 10424 bytes
SHA-256: 8c7af19123aaecfc03c7f6dfefe82e04e1d6dd990230a535541cc3b9da9e7d95