Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcae777149572f9a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-24 22:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 43068bf9f8fa731b92d0f8cc9a6426ff SHA-1: da9c0ed46ed1d7c17502b293aa46a446f61c8e23 SHA-256: dcae777149572f9ab2e3b361333c41d0f35eb7c5ff357b2ef0484a6384829c9c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=how+to+read+bedtime+stories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486548/normal_5fdb283f92a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_601ef53762503.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/3ieqGie/xinujuri.pdfIn PDF document text
    • http://vadonodip.22web.org/torowusurave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444104/normal_5fec7e4d76a58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_60352beb49ebf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fe0294c3bd99.pdfIn PDF document text
    • http://mopomelodow.iblogger.org/zetodoviwutukinanukude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_5ff5f92ac0d8c.pdfIn PDF document text
    • http://zuluwana.iblogger.org/java_runtime_old_version.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/the_100_book_chapter_1_summary.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/xinax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_601e6d2e3c6a1.pdfIn PDF document text
    • http://getizibibi.22web.org/cursive_writing_sentence_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_5fdba16db98ce.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/jchdu7E/zebozilux.pdfIn PDF document text
    • https://nokojuponamipi.weebly.com/uploads/1/3/4/8/134891784/vukazelemajuge.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/FomidvP/titovowid.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/eugga9W/83613101424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojajute.rf.gd/algebra_factoring_problems_with_answers.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/chrome_adobe_flash_2021.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_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 5132 bytes
SHA-256: baf9907b33c9b1b443f6936eb5d36c6639b2f1dae91ce4da9239970ce2d4fd17
font_01_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 10644 bytes
SHA-256: f585175241979cde94c6cf3c5bf942314aba1fa18d0c113b6b7ac09f773b17d2