Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c4075acf5dd7ca…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 05:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e7ad3abf056a466608bf0e1e7e780b8b SHA-1: 2a4ae5547e924472b365b1f7564aa4fb6d718975 SHA-256: 42c4075acf5dd7cadda2e1f5afaf3df9d1a757b05d1267543f3cdab406e5680d
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=accident+report+form+pdf PDF link annotation
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/90a8fc6e0aadaa.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/fib6jfX/rezefi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jf2iiyW/4_function_calculator_meaning.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/barivex-rizomip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_60253efeb7d33.pdfIn PDF document text
    • https://xovarexo.weebly.com/uploads/1/3/4/8/134895284/pikum.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/hc4igfW/funazirafiluwaladone.pdfIn PDF document text
    • https://venozosuvizulul.weebly.com/uploads/1/3/0/8/130814909/xusawed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_6021ef2c4ae68.pdfIn PDF document text
    • https://dalibigexewekef.weebly.com/uploads/1/3/2/7/132712129/c7134f834e6.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/jh2idKK/twisted_tea_light_alcohol_content.pdfIn PDF document text
    • https://tisemijosugimuv.weebly.com/uploads/1/3/1/0/131070246/bubotopoxogepubumol.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/gkigRlf/video_maker_photo_with_song_for_iphone.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/vizegemawokaxe/axial_scx10_trail_honcho_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/consumo_do_cerato_2010_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/steam_mac_os_x_free.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_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 4872 bytes
SHA-256: bae532903c57d8c510ae0fbee688de2d37415cff82f00722d684ef92f2d4e421
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 10264 bytes
SHA-256: 71f6c25b9019c571c3069fd7cea14bf1958b87466de271c1c9f5d02ebb90688d

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