Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff351cc5618f5cc5…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 06:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eee86d42f7494f1cf21deefa8ae82a8d SHA-1: 35b3dda83d472b9cbde80509ac4c20a3e2d6add2 SHA-256: ff351cc5618f5cc50ee260f5d9bba4554b10cf796ba74806872d8ba2f8ae70c7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=love+in+the+time+of+cholera+quotes PDF link annotation
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/goxasemilu_xezosugel_labesu.pdfIn PDF document text
    • https://xivimuwujaka.weebly.com/uploads/1/3/4/4/134440816/cc43abb6204c444.pdfIn PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/7364511.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/subatufarilipigu.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/keditewobekot_xidap.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/jibitofutover-nobom-rinagik.pdfIn PDF document text
    • https://lalusilimedam.weebly.com/uploads/1/3/0/9/130969483/pezunipo_rukozinol.pdfIn PDF document text
    • https://poteluteko.weebly.com/uploads/1/3/1/1/131164474/6ac3be25.pdfIn PDF document text
    • https://sizutipaji.weebly.com/uploads/1/3/2/3/132303075/1421223.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/what_is_a_1973_ford_mustang_mach_1_worth.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duziroro.myartsonline.com/90286531099.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/what_should_a_first_grader_know.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/what_mecha_anime_should_i_watch.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/35638318438.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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 5248 bytes
SHA-256: c3569800f00e3d93f95b2d66816c3ecf13d4b9a175d052040902b850c848f3ee
font_01_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 10280 bytes
SHA-256: d5fa41879d35b786ced0f5a474f36143ce37354715869b91964ced26476008c6