Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc46d73c99872417…

MALICIOUS

PDF

100.1 KB Created: 2021-03-30 19:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ff287c34f705df6a98baaec50917a6e SHA-1: 9db57756c39342b4e460d2b654cf9ef9ebfe9f28 SHA-256: bc46d73c998724173466a108d54f21b48f932c7e114d5af9d1f4c9e0be1b9021
156 Risk Score

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 0.9998

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://lozipotod.ru/strik?utm_term=treaty+of+guadalupe+hidalgo PDF link annotation
    • https://duzozutilitu.weebly.com/uploads/1/3/0/9/130968921/lubelimozap.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/tulijazap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_77d33d4379f34b49a26f59bea6f22734.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/how_full_is_your_bucket_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748dc633-6ed4-41b8-a1e0-9594588e9250/painted_dd_miniatures_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6941c31-c357-40e4-a3be-3a1c3e260c29/ante_nicene_fathers_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/citing_page_numbers_in_apa_format.pdfIn PDF document text
    • http://gowepuxajotezo.onlinewebshop.net/boundedness_theorem.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/asa_anesthesia_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/entrapment_infidelity_book_4_read_online_free.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_9c79a26c68904873941b0b1706f0064e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/free_ppt_diagram_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5605ee34-1a03-41ea-bc79-b946388ef103/the_best_free_daws_for_music_production_2020.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_84e29b9e8e3e48cfb52a4cb73e50a67a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rumezo/83120595553.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_off00014845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14845 5176 bytes
SHA-256: 30b3076c42aa727e5a618462ea8012556edb09cfd668d32daa8dff31e972fc75
font_01_sfnt_off000159e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E9 12776 bytes
SHA-256: 36e4c23f5c70f827fece12c9420b5767b7e6e876b64cec0b58073e81cd45d8c1