Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ec624f4539255e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 17:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0348d8c8f323caa230304ff667d38a9d SHA-1: f3be718528ea40135d86b503a26ac3bdc3e99824 SHA-256: b4ec624f4539255e1d65e3ba9a0faf0b32dd13cb943c7cc4555866f8cd395347
224 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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/award?keyword=is+the+pa+notary+test+hard In PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/voxevakuneniw.pdfIn PDF document text
    • http://domensita.fun/service_cost_of_harley_davidson_street_75085tal.pdfIn PDF document text
    • http://igclienteam.com/wafosoxaxomuderu8cwi.pdfIn PDF document text
    • http://dutuvowori.22web.org/83191885980.pdfIn PDF document text
    • http://cetakchantek.com/fiziwogarasavux8x5.pdfIn PDF document text
    • http://samettemiz.xyz/maytag_bravos_quiet_series_300_washer_not_drainingamdd7.pdfIn PDF document text
    • https://dupomosukafe.weebly.com/uploads/1/3/5/3/135387566/8ea630.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/7485838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_60130523da16f.pdfIn PDF document text
    • http://savadaqwe.space/london_metal_exchange_steel_price_graphltvn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5ffb7cbddfc0f.pdfIn PDF document text
    • http://mstmail.space/is_the_miseducation_of_cameron_post_a_true_story6mx30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gurabagoderes.atwebpages.com/pentair_triton_ii_tr60_laterals.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/85985755262.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/75362936748.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/games_to_play_with_4th_graders_on_zoom.pdfIn PDF document text
    • http://rujipezoj.epizy.com/informational_report_sample_for_students.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/cub_scout_clip_art_download.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_off0000df23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF23 5052 bytes
SHA-256: 437344a7105393a83d370d433a0a6323cf101ffd47719f6d8493cb356b993ff1
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10832 bytes
SHA-256: d9c817cb47a5175afe05e7d851b3bcd5304352f262d0291ce27d0da11c9ecd14