Malicious PDF — malware analysis report

Static analysis result for SHA-256 4771026d2c704f86…

MALICIOUS

PDF

67.8 KB Created: 2021-02-09 10:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d1d3d1d2b5c7808ca8a9b9ed62bb25c9 SHA-1: fc2e0b54030d567a4b00786d2e1072a220183c74 SHA-256: 4771026d2c704f8623bcbfbc93dda5eac6db0ebe90d87256da00b114a453d75b
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/wb?keyword=wheel%20of%20life%20tool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365652/normal_601bd022ef8c9.pdfIn PDF document text
    • https://cdn.sqhk.co/vadafepagij/jhjdhiI/dwayne_johnson_koipati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369775/normal_5fff92be55e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_601bddc23c4a7.pdfIn PDF document text
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/9824577.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/2364993.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/Lgiehib/74184158468.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/6dd5f6c5e8d88f4.pdfIn PDF document text
    • https://vunamesu.weebly.com/uploads/1/3/5/3/135324142/dofisasulexibelujew.pdfIn PDF document text
    • https://vitekasawo.weebly.com/uploads/1/3/4/4/134456264/xosurotezibu_rafimelewe_bojak_viwofuzipimiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/jehcmzO/fidget_spinner_island_new_horizons.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/burot-modaguxi-vumogip-lovasutamego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600e4091cc819.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/0hahjh4/agent_ransack_2014_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nalakakowim.epizy.com/jazirupavelebad.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_off0000cf0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0F 4384 bytes
SHA-256: fd2622012b3d92c27df9a6d19244ae797a1486e74cf29120cfc2b198a4136bb6
font_01_sfnt_off0000de07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 10788 bytes
SHA-256: 937db3ac862c8ef64062506236bdd23229f2dc46af6dbbb3bb549e730ddd40ee