Malicious PDF — malware analysis report

Static analysis result for SHA-256 63300a9d84e53b64…

MALICIOUS

PDF

101.8 KB Created: 2021-03-15 20:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 043759c0394fb4ffb686b3d987448a87 SHA-1: 07a4a5812140191cdf2414bcbdbbbff360c77029 SHA-256: 63300a9d84e53b64a6042158020b8d55bde9eeb885d26f911c39b1f0a0a2228f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://nipisod.ru/aws?utm_term=philips+series+5000+beard+trimmer+replacement+heads, appears to be a primary entry point. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through the linked content.

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 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.
  • 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://nipisod.ru/aws?utm_term=philips+series+5000+beard+trimmer+replacement+heads PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcdf558de074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5fef8418dbe87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5feb92a0a92e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fe6bfd424b1e.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/how_to_remove_battery_cover_from_liftmaster_keypad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_601cc43f1bd13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5ff862fe33648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478415/normal_60068f4741bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5fefcef3c9a3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_e38e8daedb3f4697bca6fb972ec8fc2b.pdf?index=trueIn PDF document text
    • http://revodez.myartsonline.com/37146611341.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/rikum.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/what_jobs_can_you_get_with_a_media_communications_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/yard_machines_parts_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/wovat.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/difference_between_qualitative_and_quantitative_research_design_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/mobogenie_free_for_pc_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/cuaderno_de_las_vocales_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/zawupaj.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_70a7e6bda64d43c7980dab48f262a195.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/35345795089.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_off000150e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E6 5720 bytes
SHA-256: 832ab3e42101ddbe29616da4e005d85bc1e8967c215acdaf9a24ce9fcdf57f65
font_01_sfnt_off0001642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642B 10968 bytes
SHA-256: f15875e22897b31e91873b62337e07a7dfd6ada30b3115b0aaa73f0860a7960d

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