Malicious PDF — malware analysis report

Static analysis result for SHA-256 083555a5ca643fbb…

MALICIOUS

PDF

80.9 KB Created: 2021-03-02 16:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da82b5d0c6f78ad218eb009ff3a47c3a SHA-1: f68a1bfbb17728b899a1d86ef468dfebca2d4b5f SHA-256: 083555a5ca643fbb4086d7ff9aa8ae3ee90b7c6dd9d3c93c3bf11b14f76d8547
186 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
  • 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://jottigo.ru/wix?keyword=flocabulary+answer+key+unit+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387938/normal_601180a02f308.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/mulinulixubima_fanis_dodosaxaf_futob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd3b61c7bb8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_5fd856214093b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_60210ff581455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fd99475cce56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_601b503d86775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_600d8760b3589.pdfIn PDF document text
    • https://janodapos.weebly.com/uploads/1/3/1/6/131636969/29f53fd863.pdfIn PDF document text
    • https://totidisej.weebly.com/uploads/1/3/5/3/135323484/a241e4ef77ab56.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/jhaiimK/menu_ideas_for_dinner_party_of_12.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/8058104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fee664baa229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fce91bf7d919.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/ratixifo/boss_me_25_manual.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/bleacher_report_college_football_week_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/awadhesh_premi_ka_bhojpuri_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/naruto_online_pc.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_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5300 bytes
SHA-256: c57cde9208526c06e6bf234fe5c8823a76302f954e7d4e849e130db4d03e72d5
font_01_sfnt_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 15652 bytes
SHA-256: d873792ffc968bade2b7bb9ba9b1951c44e2506f1c393dc725f5743bc1628e4f