Malicious PDF — malware analysis report

Static analysis result for SHA-256 431f4ee1acd639de…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 08:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 418873cb62f965ef79e014d9f170ffed SHA-1: 7e93ad8f36262a6708ba95395fbced8e4aab945c SHA-256: 431f4ee1acd639deb71a674edf90dca69d418562fe1f54717c2374178cf10094
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/award?keyword=sims+3+cc+magic+tutorial PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5feaf38386b32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_602d0645339a1.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/bufororagelomot.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/jamoken.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/5378480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_60170aa454426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5fcc6dd42357b.pdfIn PDF document text
    • http://kekebum.22web.org/weight_lifting_apps_android.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/falevi/cessna_172p_maintenance_manual.pdfIn PDF document text
    • http://puvumepuf.epizy.com/67966489903.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/ketudevazegelabira.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/pertussis_vaccine_in_pregnancy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/how_do_you_make_homemade_pizza_crust_crispy.pdfIn PDF document text
    • http://fejuzezoj.epizy.com/juzisiris.pdfIn PDF document text
    • http://tumaseminipofuk.rf.gd/doxefexigeralenifunozesov.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_off0000e855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE855 5388 bytes
SHA-256: 7a8ffda51d0f8d79e3c11981219c611ada9f86ceaa7e0f81b36834102c40e516
font_01_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 11496 bytes
SHA-256: 25016010b1ec81b279d0ca63ef5616d231f7dc110f4c3bf594bd06111d047324