Malicious PDF — malware analysis report

Static analysis result for SHA-256 3850b7c68398e99f…

MALICIOUS

PDF

67.7 KB Created: 2021-02-14 18:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8dc7d30fb4e5c858eb70a3fa327755b SHA-1: 7de6974849d92d46d364c18dedc18ff49e830797 SHA-256: 3850b7c68398e99f9380f9f795245d0ca6d41690f64c96112c8bd7f41cf7b3a6
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=compound%20interest%20questions%20and%20answers%20pdf PDF link annotation
    • http://usesoda.pro/bijivimikabit5vq.pdfIn PDF document text
    • http://copyrightmediahelp.com/match_land_puzzle_rpg_mod_apkaum40.pdfIn PDF document text
    • http://sis-paypal.com/94752236649nmcpd.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/23131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389797/normal_5fd0498028f9c.pdfIn PDF document text
    • http://itdiscount.info/winrar_zip_archive_password_unlocker_freelw622.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/3991948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_601cff913e09a.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/5518876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/pobudizededo.pdfIn PDF document text
    • http://baniginoso.epizy.com/geometry_proofs_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/collective_nouns_worksheet_7th_grade.pdfIn PDF document text
    • http://voxavupe.epizy.com/project_issue_log_template_excel.pdfIn PDF document text
    • http://patenat.epizy.com/alkalinitas_air.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/oc_bold_typeface_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/91235130464.pdfIn PDF document text
    • http://rejinivak.rf.gd/fiserovovedut.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/daxedugexolo.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_off0000cb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB46 5280 bytes
SHA-256: f789e0262a5acc4039d86973d492a4c14b0647b8ed095d828f922451f4e48c18
font_01_sfnt_off0000dd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2E 10724 bytes
SHA-256: a599a9181f9bc2a78ef8f5024c4336087a64519283919daaac88d2c71491570a