Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50a083219c95aec…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 10:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 16028bbb4cebf199db585af7e717f0f7 SHA-1: 57a43e1fb83c8448ace0a9a5e2daa4633f3b19fe SHA-256: c50a083219c95aec85327c84ff914db51c1991cd032ba4c5c73593051f72dcca
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=pearson+precalculus+6th+edition+answers PDF link annotation
    • http://lovelyhouse.online/unicode_converter_freezwrr4.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/PihEgdg/61430516603.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/c57fcd1ecdcaeab.pdfIn PDF document text
    • http://tells.fun/watch_guide_gentleman_s_gazettewwns0.pdfIn PDF document text
    • https://zavetogodafewer.weebly.com/uploads/1/3/4/7/134709275/kavakifuzebafum.pdfIn PDF document text
    • https://rogebupapopax.weebly.com/uploads/1/3/0/7/130739826/bf0f28.pdfIn PDF document text
    • https://jupedozezuwobig.weebly.com/uploads/1/3/4/0/134040413/wiguxiwejivi-nadasepotuk-luwub.pdfIn PDF document text
    • https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/e8dda97332d04ff.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/polubamijilipafir.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/icidgcR/soni_t_hegde_wallpapers_hd_4k.pdfIn PDF document text
    • https://maraliva.weebly.com/uploads/1/3/2/7/132712127/zonopolu.pdfIn PDF document text
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/e75266.pdfIn PDF document text
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/modugafinatuvegemem.pdfIn PDF document text
    • http://alcozerox.com/algebraic_equation_worksheets_7th_gradera98y.pdfIn PDF document text
    • http://tesar-krd.ru/1315609373ihni8.pdfIn PDF document text
    • http://reweder.site/6703209371352vxj.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/Dtihoif/79926913150.pdfIn PDF document text
    • http://logoped-samara.ru/pse_tuning_charttjwql.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/ghBZgcm/hitman_3_ps5_upgrade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 5408 bytes
SHA-256: 7b343374cb24656ac5a6c4589d1b50821084c70b1e070534f75fda7e747ee84e
font_01_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 13664 bytes
SHA-256: 65dce0ceaaf014bc53721b0ea5e4025386afb17c38a1b32b912d6c537fd4a3d1

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