Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea369179d86c6e1…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 10:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 59117e9bcf3f3c0087518a4c0dbe5d70 SHA-1: d3aa29c0985a568fad29d46d3395b7e24b49ad8e SHA-256: 2ea369179d86c6e1945b96dcbd1457780c95e59cb4ccd49a5f955b0948e8e105
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL pointing to zajinet.ru. Heuristics indicate it functions as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=kitchenaid+range+with+griddle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402267/normal_602f3e1d3418f.pdfIn PDF document text
    • http://mebets.xyz/71678298178i51w2.pdfIn PDF document text
    • http://uaportal.site/mejores_libros_de_fisica_basicamjhpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_6028ed3056ec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_6048a8c2a75fc.pdfIn PDF document text
    • http://blankid.ru/why_dark_knight_joker_is_best9np8z.pdfIn PDF document text
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/87518cc6f4b.pdfIn PDF document text
    • https://pabalosuto.weebly.com/uploads/1/3/0/8/130813917/98dc1ffe10104db.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/up_board_class_8_english_grammar_book.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/zepunoperipedixoxaxevw1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_6051f1a94cafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458856/normal_5fec4cafca27e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df4c511-d7ee-4371-a4b2-aba19e3d30e8/patricia_bragg_books.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/24461502461.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/zefefizekikuxadedon.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/79806067302.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/borefozegujebijixeji.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/aladdin_disney_story.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/reporter_jobs_san_diego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7f5390-2131-4905-9276-fa742a92b2d8/foxit_editor_serial_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543838a0-8311-4a62-b0e7-3290827fe451/islamic_dream_interpretation_black_dog_bite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f522a50a-6203-471b-bf38-2c4d5af4857d/10718119927.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/77356489894.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/underground_mining_methods.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_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5084 bytes
SHA-256: 617ff447f9c7abd2484dd1972ae3a967395cad1c32f2f6e1eb9efec3990e3787
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 10788 bytes
SHA-256: 0b1d052dc5e7fcf7e91df3fc3b3fafdf25c87f56b47c64e79a76507380f97a89

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