Malicious PDF — malware analysis report

Static analysis result for SHA-256 809f060973f2b5ce…

MALICIOUS

PDF

85.3 KB Created: 2021-05-01 12:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f39d075b8108b1ac62ed877809922b7 SHA-1: 70d5c9b275f764e377c29fd3dd5f7f4b657bf130 SHA-256: 809f060973f2b5ce00851796d8c7dd732267655c765d2bd2757462b3df3e1aa0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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://baarspo.ru/strik?utm_term=karcher+electric+pressure+washer+will+not+turn+on PDF link annotation
    • http://jifarobajis.sportsontheweb.net/nipafitepapipogosoto.pdfIn PDF document text
    • https://cdn.sqhk.co/kojagopomon/HYhfOij/activemq_5._15._2.pdfIn PDF document text
    • http://gefokugok.getenjoyment.net/58234459098.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/haIvL5I/best_bass_booster_app_for_android_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471958/normal_5fcc0047e5e83.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/boxers_diet_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_601f81ac2776d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_605355c7aa89d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_60057a740fbe2.pdfIn PDF document text
    • https://cdn.sqhk.co/tojemapimibo/phgijMR/tusugobimotalep.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/506df68e-c4f7-4aa6-b79b-bb6db5d18414/how_to_find_the_mean_from_a_grouped_frequency_table.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/wodufevebidanelun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03ab3cb-8510-4229-b16a-c269a005a862/20459020126.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/john_deere_gator_825i_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/akha_ka_yo_kajal_song.pdfIn PDF document text
    • https://2b095ecd-e7a3-45cb-a122-23ed11f0a332.filesusr.com/ugd/613052_5248f9324082478d9afb00dd0f74f89f.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_a33d0529cac944f78d601935e4508775.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7c9fbb-a7fa-4f6b-b870-07fbe9ddd178/78649830699.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/pivomegamuwakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/below_are_some_data_from_the_land_of_milk_and_honey.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_d015aa1e4d6242debf928a30fe8f9f55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cd512c-c07a-44e1-a65a-a83e166a1f61/73006615622.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_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 5084 bytes
SHA-256: a9c47ddf9be12b6c23cd2287bf6a916637fe40108867fb076fd842ea792a5629
font_01_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 11412 bytes
SHA-256: 683a3e7cb1a32d4349c206fc958228d0b3143cb709a4e2dfdc8a6f3e3db9a187

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