Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3da2ef0b5f2aa4…

MALICIOUS

PDF

78.7 KB Created: 2021-02-21 19:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42c73e4c1e13bb5e59fb323013de47d2 SHA-1: 206e14b3855666b6469817f8622e6329dade612b SHA-256: 3f3da2ef0b5f2aa4f80798800f835f5c2bf9882f9a9d471d3dacf3be7c93d1a0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=model+factors+lesson+5.1+answers PDF link annotation
    • https://nizerekudoni.weebly.com/uploads/1/3/5/3/135383630/106651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fdf62d4dc542.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/vesigupurivilalomev.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/ranozomukapagef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422136/normal_5ff1f468a10e0.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/siregixuwikow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449406/normal_600c717e5beaf.pdfIn PDF document text
    • https://buduruzuled.weebly.com/uploads/1/3/2/6/132682090/306011a1.pdfIn PDF document text
    • https://wilibupa.weebly.com/uploads/1/3/2/6/132681560/zatuke.pdfIn PDF document text
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/pisevipojirivo_nawulurij.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/niwotipugonuvoz/consumer_reports_one_cup_coffee_makers.pdfIn PDF document text
    • http://muzubosumewuxem.epizy.com/binaural_beats_for_meditation.pdfIn PDF document text
    • http://begosene.epizy.com/rawoxisexinejebijodapip.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/sutetepib.pdfIn PDF document text
    • http://tuvojiteziw.epizy.com/kaththi_sandai_full_movie.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/imo_2017_set_b_answer_key.pdfIn PDF document text
    • http://xipipowateselok.epizy.com/old_honeywell_security_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/fejutot.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_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 5320 bytes
SHA-256: 873b9b25ca6ba37ec78475753b983940d86edb2cd6c84ca81c6cf39eefb2268d
font_01_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 10672 bytes
SHA-256: 556b10465d18eb1067424fc8cabbd07f439144e293b3d25a748f6205fb54da4c