Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51326eea9497713…

MALICIOUS

PDF

75.4 KB Created: 2021-02-15 21:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16aa9e82b2e2d71fb2feb7034f3aaf0b SHA-1: c4fd904efc0e0feea8f836cc9b8706ca44418bfd SHA-256: b51326eea9497713921607233e1f09ceb02444ba8a4cf2143263a26990035f29
146 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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/wb?keyword=is%20the%2010%20day%20smoothie%20cleanse%20safe PDF link annotation
    • http://theraisins.pro/dafiwezuzowolobiwimoloymf2x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5ff0c23919f36.pdfIn PDF document text
    • http://hotsales-com.xyz/dayton_oil_fired_heater_partse9py9.pdfIn PDF document text
    • https://xamikike.weebly.com/uploads/1/3/1/4/131406211/bodafimepu-vugigozosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_60179ac19c93f.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/beast_quest_series_4-_66c98f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464709/normal_5fda0005692fa.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/voleseboku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5fc9cf43d54a1.pdfIn PDF document text
    • http://urott-hu.com/inorganic_precipitating_agentsiblfx.pdfIn PDF document text
    • http://stileidmo.fun/39742828871fy5pm.pdfIn PDF document text
    • http://buytoday.cc/biology_corner_worksheets_sponge_colorus5ii.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/8f4ab74bac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc9166834bf5.pdfIn PDF document text
    • http://lidlid.xyz/paponizafasalobfnwwg.pdfIn PDF document text
    • http://1pokypki.website/8063882989605uwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_600bf1c013eab.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/gidibesuxi/nomusow.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_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 5396 bytes
SHA-256: 667a3bd50eed605a3e98057a97627464bf613b289fd6f70a4380a397f3165f53
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 10916 bytes
SHA-256: 5cce3e726c577bfb1cc5cef428a1a799674e0c2f62ce538c35903d0e73c1726a