Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea1c3c355e24b29…

MALICIOUS

PDF

78.5 KB Created: 2021-02-24 23:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7ecb9e81befce9de84678970b8a8a207 SHA-1: 7f4fff96dd903da33664a5f61ee84c7ab4e6d657 SHA-256: eea1c3c355e24b29a98cf5caa40803b322ebe628fbcd4de9422d59967c942e1c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wix?keyword=nebraska+2020+football+schedule In PDF document text
    • http://gratoramaa.space/rovatuloboxenurokijabxpqdg.pdfIn PDF document text
    • https://fikuwigo.weebly.com/uploads/1/3/1/0/131071253/davilixipa-nijasekil-mexukexorewuril.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/labview_student_edition_textbook_downloadx1fz8.pdfIn PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/7e973461bd19d89.pdfIn PDF document text
    • http://cheapkeys.site/bomeseduzugigaso0n8k8.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/ralepolub.pdfIn PDF document text
    • http://zofazosedam.iblogger.org/samsung_un40j5200afxza_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476780/normal_6012d6188cc00.pdfIn PDF document text
    • http://opticsystem.website/fodakojirey2ptm.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/fikovisi-wivuwi-suxobis-raranunamuwi.pdfIn PDF document text
    • https://torewofatovamek.weebly.com/uploads/1/3/4/1/134108613/zorinok_lawediwe_buvufejifup_kusiwurom.pdfIn PDF document text
    • http://24magazine.ru/upsssc_je_syllabus_2016k56vo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwizenodemi.epizy.com/what_does_the_bible_say_about_knowing_gods_word.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/vadibujagube.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/calendar_2019_january_printable.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_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 5556 bytes
SHA-256: 99764311cea70697edb922ea59668f8778c0e18e47eec1c1a4936dc4164d6c69
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 10400 bytes
SHA-256: f72ce5128cabc10d6165124e2d6ed486f2e613c5c2ca6743c47822e2cab79661