Malicious PDF — malware analysis report

Static analysis result for SHA-256 b583a73f53d65d71…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 21:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d595055afc23ea142bcf511df635c1c8 SHA-1: 53b3ee407ba2f7b7b7de9d4e1e02f16aa8f416ae SHA-256: b583a73f53d65d716a843bb29ff78ece68560351a6f5d5e8e8c4567153d6e406
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=interview+questions+for+cashier+position+and+answers PDF link annotation
    • http://stat-index-co.com/23308273616l2qn6.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/wixiwotenimajijojadi.pdfIn PDF document text
    • https://cdn.sqhk.co/samuxoruja/iiczigf/drama_a_night_out_form_2_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5fd32062e5dfe.pdfIn PDF document text
    • http://true-board1.club/battery_charging_appsca50w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5feb0e3c956f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_60436bee245b8.pdfIn PDF document text
    • http://megikinazemurel.22web.org/44663758936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6017ca0cd85bc.pdfIn PDF document text
    • http://theplafond.xyz/chrysler_sebring_2008_user_manualpzz98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_6039d179e2897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420240/normal_5ffdebae9af21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fe47e03a8dd4.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/30982635153.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/5501327622.pdfIn PDF document text
    • http://malanefire.sportsontheweb.net/clasificacion_de_los_numeros_racionales_fraccionarios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_604729a7ed770.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/jfDjec4/15756174425.pdfIn PDF document text
    • http://santand-es.com/teaching_english_as_a_foreign_language_free_online_courseyc7ns.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jidoxib.rf.gd/sopenufen.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/10199587453.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5308 bytes
SHA-256: c8cfdcbf81b061a499ce7b769d980999cc0762cebcb1733d734ecc3f3dfa9e55
font_01_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10596 bytes
SHA-256: a3909856efb9a7b254658bcb8c4e4a6d5207e6d6c53fdde180dbebb57412c630
font_02_sfnt_off00012173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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