Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b17bf7c88553f9…

MALICIOUS

PDF

67.5 KB Created: 2021-02-16 23:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c1971c44035a167b52a9639ff9f56047 SHA-1: dde92bd77819db76cebe2db2736b6073289fb945 SHA-256: 72b17bf7c88553f95c8b75a1893a6cdba5b22312798883b2ad34a0b098dbc449
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=lightroom+crack+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453754/normal_60157f054ddde.pdfIn PDF document text
    • http://nncucuucuc.space/auxiliar_de_tecnologia_da_informao_salarioq9fqq.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/dumitowisepewa-zidetujebefap-zibedid-rojuzegi.pdfIn PDF document text
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/ladomepizeka_daxapitixox_jarabirele_soluladunul.pdfIn PDF document text
    • http://hdvideo.design/interlinear_septuagint_greek_and_english4jvhx.pdfIn PDF document text
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/nogeferejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_6028bdd7d4b31.pdfIn PDF document text
    • https://vidanametok.weebly.com/uploads/1/3/4/3/134318125/woviwamawigizu.pdfIn PDF document text
    • http://legiontry.online/peppered_moth_simulation_worksheetpqyhz.pdfIn PDF document text
    • http://begetus11ppz.xyz/583943580028sasl.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/9042743.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/317bb6f6384d40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_6020a7599a3b2.pdfIn PDF document text
    • https://xujoxufopugapes.weebly.com/uploads/1/3/1/3/131380539/499dcbf804c.pdfIn PDF document text
    • http://copyright-infringement.business/sejakotixazebovikapiwitn1r.pdfIn PDF document text
    • http://ig-mediateam.net/84701649987de5k7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewivawegimomu.epizy.com/airplane_fighting_games.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_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 5248 bytes
SHA-256: 886f3b52418fbc3dda9ccdaf32d99896cdc9a00381ce5f5497193b5e95bf0425
font_01_sfnt_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10564 bytes
SHA-256: fb8869503b221c0bd04f195a082b456adb0d684d689b6c1cae038aaecc67fd81

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