Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfea61e0a2fe257…

MALICIOUS

PDF

75.6 KB Created: 2021-01-27 05:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 24f5bcf134374ac3788f819fd638d29a SHA-1: c9c7bbdeeb7b4e62df4dbebf09a710cebb00428c SHA-256: 4bfea61e0a2fe2576d0fdb6697f8adee771177e7ea845084444f9d1c4cd8e8fb
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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://maypoin.ru/shook?utm_term=lenovo+ideapad+chromebook+duet+review PDF link annotation
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/ropapakuzivizafobej.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/984754482332xzef.pdfIn PDF document text
    • http://medtechnika1.ru/buligajbxd.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/Fjehey7/74284883721.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/dLicPhd/vokoxazisi.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/2bcb947.pdfIn PDF document text
    • http://instapriz.website/zugesunoguboweromuvc78t.pdfIn PDF document text
    • https://cdn.sqhk.co/xijoxerivu/ficxVUx/sudoku_puzzles_with_answers_9x9.pdfIn PDF document text
    • https://kevifuzokidoku.weebly.com/uploads/1/3/5/3/135310888/1181560.pdfIn PDF document text
    • http://counterman.ru/le_management_des_risques_de_l_entreprise7dzt2.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/wixiparugulojakoza.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/7hi0egj/63982015303.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/vexosafugunu/kenesolokebu.pdfIn PDF document text
    • http://pababevo.epizy.com/cavatina_partitura_para_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/resignation_email_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/2004_jeep_grand_cherokee_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/turalifajawexe.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/buroximubaruz.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_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 5400 bytes
SHA-256: b546d97ba0f93d88a6e24e823719f34b7bafed432ffba54c0f07047422c0b5ba
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 10672 bytes
SHA-256: 817a1fa2ddaed4f509ebe868e50b73342306dbdba92cceec2593c45f010a949a

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