Malicious PDF — malware analysis report

Static analysis result for SHA-256 39dc356f0972d69a…

MALICIOUS

PDF

79.5 KB Created: 2021-02-20 11:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f8370e019cd0b0997130f033184fd648 SHA-1: 512cdf3d270720136d0832fb7770f070bf1b116e SHA-256: 39dc356f0972d69a659e32b6747cff83a44226e5a0fba37d0e9ddf45c5bbdf75
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=blown+to+bits+chapter+5+answers PDF link annotation
    • http://rrrrkkkkk.space/mesomikabosawivawibujijrjjyc.pdfIn PDF document text
    • http://grampus-shop.com/8617961734196wur.pdfIn PDF document text
    • http://raffle.website/strategic_planning_for_nonprofitsnkqth.pdfIn PDF document text
    • http://optalpha.com/270268565572ebv8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_60248be48763b.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/tijaxonadn3l7q.pdfIn PDF document text
    • http://azakalaza3.xyz/1441316940rgjmb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_6001d3a04768c.pdfIn PDF document text
    • http://a1metromovers.com/cloze_test_practice_with_answersue14u.pdfIn PDF document text
    • http://fitit.space/personal_statement_samplecpauv.pdfIn PDF document text
    • http://espaceabone.com/compressed_sheet_mask_diysfila.pdfIn PDF document text
    • http://usblighter24.site/73812539167yyiww.pdfIn PDF document text
    • http://snatural.space/solve_slope_intercept_form_calculatorbef83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velefaluzi.epizy.com/balotodokafuboji.pdfIn PDF document text
    • http://pitupeg.epizy.com/xemosi.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_off0000fb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1C 5428 bytes
SHA-256: 329fe37fb397d07e86ca05b71943cd7e8fbd5d01e5a84bd79495ac51141a2e8b
font_01_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 10424 bytes
SHA-256: 11d49b673c8e3d129d5cc38221a75b4c05b4507a4e8e594241e2abbf9ce1980d