Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc8bc8ff6304445…

MALICIOUS

PDF

71.8 KB Created: 2021-02-03 16:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 5d65d1bc2c13a2e8bec4e75ca7e9be61 SHA-1: 438387fba9c44c931b0e9106dc0ef4f6a7af3a63 SHA-256: 4dc8bc8ff63044454c8fe86e48728ba215c11e697021c64525f7100668122e0b
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://leonvi.ru/aws?utm_term=ignou+b+ed+online+examination+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375341/normal_5fc9bdbf92a54.pdfIn PDF document text
    • http://vofamewa.22web.org/album_gana_song_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_5fdbfc8e7d6f4.pdfIn PDF document text
    • http://wusejopajaxus.22web.org/zuzunuzilowizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5fe6c645ceb16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5fd6649f84114.pdfIn PDF document text
    • http://lexidubug.22web.org/82372913511.pdfIn PDF document text
    • http://topagut.iblogger.org/barron_s_ap_calculus_ab_answers.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/letixizadulatagotin.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/EiboCha/3on3_freestyle_basketball_mod_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zigimavabixexib.epizy.com/82261736033.pdfIn PDF document text
    • http://vudafudilisa.epizy.com/taxezulixutobi.pdfIn PDF document text
    • http://mejusamenubeto.rf.gd/classical_conditioning_ap_psychology_worksheet.pdfIn PDF document text
    • http://jimuxilobu.rf.gd/sedatitiwizudi.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/57895626699.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5192 bytes
SHA-256: 2f27b5bb8f9b26131f90a66ee23f87b6271d57361b00d2d3dd1d12b81e0f3cb3
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10844 bytes
SHA-256: 79a7caa08dac36a7a7e3cd68c1e95054d666bf6f87b15d6dc69db4630e9644f5