Malicious PDF — malware analysis report

Static analysis result for SHA-256 750cebee2652e9eb…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 18:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7526a58047f7ef1bdb8c5815f03a56be SHA-1: fa9bfbbb9fd2485b599261805a77cb8ce7536478 SHA-256: 750cebee2652e9ebe8d0d2e4a2df0f394190f8843d3b6f35cc757cda4a40e01d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://kuzutuzo.ru/award?keyword=lg+tv+100hz+refresh+rate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454419/normal_602a2ef192cb0.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/sotazijenerag_mewigeziwu_vuxeverigomuwof.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/haYvhgf/38865105572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_601bb3d268f15.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/cjf4Ugy/26013779010.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/tubuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ff34987a0db0.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/XqVjdhb/3344924563.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/go881ge/top_programming_languages_2020_chart.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/dogazisuze/logique_squentielle_les_bascules.pdfIn PDF document text
    • http://jekowatu.epizy.com/chillar_party_full_movie_in_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/superman_vs_batman_game_for_java.pdfIn PDF document text
    • http://nanesipub.rf.gd/questoes_de_probabilidade_e_analise_combinatoria.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/53901855673.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/29147621134.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/88044611202.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_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 5244 bytes
SHA-256: 31f6654a77ec117d02e9cc7178e0fc9fcaf0699f1fa59498fb0f197d84e8e03f
font_01_sfnt_off0000ef79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 10536 bytes
SHA-256: 255a1c24cac32902f57a1ad0ee913d65bbc022ebd3d47d983eb7642c60e22e4f

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