Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec22502ffa5454d6…

MALICIOUS

PDF

67.5 KB Created: 2021-03-05 00:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 829819152acf9d789b72546e079192e1 SHA-1: a9346dbb349c63e89eab8dd09d6ef766208a2193 SHA-256: ec22502ffa5454d6bf482e7083ea10774b328602034919ae9ceee82d80b1ec3f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=fe+mechanical+practice+exam+pdf In PDF document text
    • http://vanlit.ru/how_to_encourage_baby_to_jump_in_jumperoolli2y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_602c6dd5ac66c.pdfIn PDF document text
    • http://daliadiago.com/sole_e25_vs_e35_2019fqi8j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_60079b606fefb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fc71e9e5a988.pdfIn PDF document text
    • http://vsedlyatebya.xyz/identifying_the_12_stages_of_the_heros_journey_hercules_disneyigjg0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_60238338bdea5.pdfIn PDF document text
    • http://optarfes.com/a_raisin_in_the_sun_movie_1961ghm4k.pdfIn PDF document text
    • http://neojust.ru/18029635563tt3r2.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/gifesozumogot.pdfIn PDF document text
    • http://maewallace.com/samsung_bn59_remote_volume_not_workingtr8ln.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/4mij0bj/tamevakewuvavafabotizojom.pdfIn PDF document text
    • http://golomashvanna.xyz/hyperdimension_neptunia_re_birth1_boss_guidegi9sc.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/Cgdghtr/maletogokumotufitizeto.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/4114431.pdfIn PDF document text
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/pexametudiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ccf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF5 5240 bytes
SHA-256: f0760c41f7c3496511628e6a39e02d19cf0e6ab6766fc6ee8a3a842786ae241e
font_01_sfnt_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 10112 bytes
SHA-256: 744a9624f6dfc3d28fd32ccd34cfcaccef0256266d610b1c1b06bf368b6e1f77