Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf808e3a6dc23f51…

MALICIOUS

PDF

143.6 KB Created: 2021-03-09 20:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cd97d68a30b18e1332a802aca453b526 SHA-1: 595a05dbd3dac103f7aa720c13c1181c86b7a48d SHA-256: bf808e3a6dc23f51ca23b43402edc9d53a4f5b93193757c7993bc3d8189c926c
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, including a primary link to 'jumiwimov.ru/award', suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://jumiwimov.ru/award?keyword=apj+abdul+kalam+history+in+english+pdf PDF link annotation
    • http://ligoturup.22web.org/69666554533.pdfIn PDF document text
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/5537150.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/nejipabek_gikusefapedalig_mifij.pdfIn PDF document text
    • https://sozefusezat.weebly.com/uploads/1/3/4/8/134860931/d71e13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/pizonalujefisipov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240d446c-a0b9-4be5-b23f-28735ce54974/what_is_a_good_rate_for_a_financial_advisor.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/50425091151.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/jozokijixujawibanituxupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b345aa83-4f23-4e91-b1c8-4021445c22b3/98716955356.pdfIn PDF document text
    • http://siwinigap.epizy.com/nomamezamiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/burger_king_application.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_8e7fa0840d4e4cc2ac033f5b6c95695e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukujidor/95269769334.pdfIn PDF document text
    • http://mimewimirul.rf.gd/jamalpur_weather_report_7_days.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/sch4u_organic_chemistry_test_answers.pdfIn PDF document text
    • http://zokibepi.epizy.com/tefimovunag.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/gaxowugepafesarunur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b73adde-3914-44b7-bc6e-9f70e6c9eec5/health_ometer_digital_scale_manual.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_c6aa53715f0f448ab88fa30e5d8aad1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/334256e5-f050-4abb-8c96-174f0bb95c94/rofipifaja.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_045965a73fc948ba86e6d948efa0c35d.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB48 11420 bytes
SHA-256: 2cd65c3749a34fbfa8d65bdcac6065471849cdaf451d2d4a7b723dc826b6abbc
font_01_sfnt_off0001e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0AA 5828 bytes
SHA-256: ae0bee462b03e0a2a90a4b801e53ba060198484019e8bc8bcf8be956c1eebc3e
font_02_sfnt_off0001f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F45A 11136 bytes
SHA-256: 3e2bc18dfc420f34b055100470705b47f5d773aaa6e6dcf9c3841d056061245e
font_03_sfnt_off00021a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A55 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6