Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb6fe0676f5df83…

MALICIOUS

PDF

71.3 KB Created: 2021-02-08 05:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3a2dd5afa88b73032b3752d0b7669937 SHA-1: 0911f30d30dc9f3c0a75fcfdf0d47d0b20a245dd SHA-256: 1cb6fe0676f5df83307e7cef21b04ca704c97600dca37d3fecdabcd77f7f3a3d
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://baarspo.ru/wb?keyword=bendable%20metal%20sheets%20for%20crafts PDF link annotation
    • http://kigowamukidiba.iblogger.org/application_format_for_leave_in_company.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/935b5f7.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/ZT10ltZ/35816808819.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/PihjaXT/48369830630.pdfIn PDF document text
    • http://xrootunited.com/the_grave_hoard_codedles7.pdfIn PDF document text
    • http://photoforce.ru/temerian_valuables_quest9nywh.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/429c3466db.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/UWWDmhW/be_soccer_football_manager.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/3jihcnw/nonerugepi.pdfIn PDF document text
    • http://true-board1.club/pixomexegorijobawobudadgwjgc.pdfIn PDF document text
    • http://websecurer.tech/vusupalajaratidijuzubi0n3.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/rtggOFT/guess_the_emoji_movie_level_3.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/govindam_defence_academy_kuchaman_cityzt5aa.pdfIn PDF document text
    • https://naligunuded.weebly.com/uploads/1/3/4/4/134472871/835b6478a9a34e.pdfIn PDF document text
    • http://study-english-02.space/pabubugebakoegg40.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_off0000dc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 5452 bytes
SHA-256: fbcaf9c951815df9afbdc468f210fcfd65bab2a82af75a716a0484fee4e418e4
font_01_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 9984 bytes
SHA-256: 3bd270759e1d6f42346995f632d4a1a98f725eb55e50c85890c75b86990420f5