Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d403419c395057…

MALICIOUS

PDF

79.3 KB Created: 2021-04-29 10:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 755d958d0d1aeebc4060be3d3c069c28 SHA-1: d8be0339227bde8e2cdb934c68e890f310d95274 SHA-256: 70d403419c39505794e63097ec51f4d6131c0a345aa175b9864416695068bc90
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and redirectors, indicative of a phishing campaign. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically flags this as a brand-impersonation lure, likely attempting to steal user credentials. The presence of a link to 'resalured.ru' with a 'briggs+and+stratton+generator+carburetor+parts' UTM term suggests a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/nexawikol_zobukuzetu_xogoxenazaju.pdf.
  • 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://resalured.ru/strik?utm_term=briggs+and+stratton+generator+carburetor+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5fe2133100d11.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/cuales_son_los_anexos_de_la_piel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387702/normal_5fe1d175a8cf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_5fdacefb1ce37.pdfIn PDF document text
    • https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/nexawikol_zobukuzetu_xogoxenazaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_600ccbc3c1008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fe04863d6aeb.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/aircraft_maintenance_manual_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451750/normal_5fc993a00381f.pdfIn PDF document text
    • https://kasozufadoji.weebly.com/uploads/1/3/4/5/134523760/nodopapineb-vasuxem.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/kogaba-dotatiwusovipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_604a8ea508592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484618/normal_5fd1e87ba8e0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_56e909ae10774553a85044f1fca992da.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_2aea451e0a884c928ba887821edbc94d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/american_sniper_movie_full.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/vivopuxevaxoxeduzomif.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_3516e8048ba1439ea4bdb803958cb98e.pdf?index=trueIn PDF document text
    • http://fazegujopazoj.atwebpages.com/1932822947.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/85615965577.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/diccionario_espaol_en_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/99168081016.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/69733749751.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/82669232928.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_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 5400 bytes
SHA-256: f413ec21a99e5967e9302a1bc9e3e15c6ccfade88ffb6617825d0eb37838b4f0
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 11644 bytes
SHA-256: 6d1b3b3aac1acef0472d6d773dbbc0b134e799f65b3fcf5fac537f4162229950