Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95c520a9d8f71a7…

MALICIOUS

PDF

73.3 KB Created: 2021-02-15 07:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e5594762cb7fbf506481949f21664a28 SHA-1: b47b95d6dc8be91967dff914a98455b18ff76b59 SHA-256: a95c520a9d8f71a7f2b757af37817ae42a4224fe2d846192e3eb64039e271e0d
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://maypoin.ru/123?utm_term=lee%2527s+summit+schools+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fe6c4bc29727.pdfIn PDF document text
    • http://groshyk.site/big_ideas_math_advanced_2_textbook_answersatx2h.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/28cca01.pdfIn PDF document text
    • http://ijmalan.xyz/tovinotuxurexu9yjhw.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/diggeje/15324996548.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/799a6ed7b5c2c4c.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/2426973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_600b125e01326.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/DHYtjaf/zombie_running_app_iphone.pdfIn PDF document text
    • https://dejibifugav.weebly.com/uploads/1/3/2/3/132303230/vosodesubo.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/jjaGtii/xogopolifi.pdfIn PDF document text
    • https://gelatotagubas.weebly.com/uploads/1/3/0/8/130813077/zeneviwegajizut-wavaxodi.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/6jciijb/pokemon_go_plus_emulator_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5fca8b63891b4.pdfIn PDF document text
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/desejo_pesokutixumekaw_rimozepebosujij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibedufuranuju.rf.gd/contact_us_website_template_free.pdfIn PDF document text
    • http://dufeniwa.rf.gd/womew.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/53460542046.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_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 4924 bytes
SHA-256: 40d8bd81e6fa55e78caf88266a67c87b804403cbd2855d22c26c75a1c7abe384
font_01_sfnt_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 10360 bytes
SHA-256: 603b70dbfb0831b500574dd5fda1692e6fbf529dfbd1aa4e9f21baaee4194b76

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