Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71761c9c3e21abd…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 05:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 31642182aa0a87af44d82e9ae5841aab SHA-1: 9a4e08711ea19595d7e24a644fb484ce06cb6884 SHA-256: b71761c9c3e21abd2816efc7648cc18b94d21bdeb4cffb97cf19227e6207fd27
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=how+to+clean+your+smart+board PDF link annotation
    • http://wolotalute.iblogger.org/guideline_tb_paru.pdfIn PDF document text
    • http://helpcopyright-service.com/rodiranov5r2n0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fd6dbfc8ceb6.pdfIn PDF document text
    • http://motowifenizemuz.22web.org/76698561516.pdfIn PDF document text
    • http://vanesifonemume.22web.org/18855721639.pdfIn PDF document text
    • http://jubujufop.22web.org/moxowatusaxeroruvaromu.pdfIn PDF document text
    • http://masito.space/confirmation_of_indemnity_letter_template4k3f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_6017b37517739.pdfIn PDF document text
    • http://jusibebobekig.iblogger.org/modugivekedurofizozijige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katilujovuge.rf.gd/iycf_guidelines_on_complementary_feeding.pdfIn PDF document text
    • http://zonadomafi.rf.gd/mukewirabovetudodezi.pdfIn PDF document text
    • http://vukupemenamumoz.rf.gd/simple_present_tense_quiz_with_answers.pdfIn PDF document text
    • http://zojimako.rf.gd/36715359012.pdfIn PDF document text
    • http://kuxukinilu.rf.gd/template_for_application_cover_letter.pdfIn PDF document text
    • http://jifobobaganut.epizy.com/lekesizizinosukije.pdfIn PDF document text
    • http://navepufukoxo.rf.gd/capitalism_lab_beta.pdfIn PDF document text
    • http://datidogebe.epizy.com/android_snackbar_set_time.pdfIn PDF document text
    • http://rejazimuperolik.rf.gd/jorijanefidokanosasewigo.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_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 5380 bytes
SHA-256: 157086ec4de555569817c15559c96067fdc89c6eab283ed4693e74aef297fafd
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 10728 bytes
SHA-256: 4b8375237b3b111e165b8edbd88ad5317dab1caf772b91d40c9c23f026315f04