Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc29df0e561c62e…

MALICIOUS

PDF

82.5 KB Created: 2021-04-18 20:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 85fa43ee139149485076a407bf0426f3 SHA-1: 795c75e686a28e791bc318eaec0d14d5bd2d277b SHA-256: cbc29df0e561c62ef7100bb767369e7f9d95764808b5f00068aa815207b02b58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent URL pointing to a site related to 'red dead redemption 2 hunting guide online'. This URL, along with many others hosted on disposable domains, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection of users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=red+dead+redemption+2+hunting+guide+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479925/normal_605cad3227df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_6016c3f2b266e.pdfIn PDF document text
    • http://jobauthor.online/block_tank_wars_unlimited_money00qja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391899/normal_6004b22b27eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_602fc4f6aac12.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/Wgg0Gic/satubato.pdfIn PDF document text
    • https://cdn.sqhk.co/munakuvu/0pEicRD/50345239402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc848ec6439e.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/circe_book_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_602414719922b.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/renidiwexoku.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/ZghhcPY/bizomep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_602afa8da537e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6051071f2f9ee.pdfIn PDF document text
    • http://telemprom.xyz/binuzarotavatelulupadesasl0e2t.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/ciiejho/animal_crossing_pocket_camp_guide_flowers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fe83ab607c1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagijido.myartsonline.com/silifuvepozexafewepe.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/happy_anniversary_song_with_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/desibidifasivuzewagupo.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/easy_camera_for_after_effects_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/login_page_templates_bootstrap_3.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_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 5332 bytes
SHA-256: d3832f2baf55373a72b4882d17b654c710aa6394ed2f69cb54013aae6b1762b3
font_01_sfnt_off000115eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EB 10832 bytes
SHA-256: df568b31ce7962f7da0893c87503bdcea0a02f819a6990b33adf602dfd6ab935

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