Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec0c2da002edc09…

MALICIOUS

PDF

76.4 KB Created: 2021-03-28 00:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faabe3754df5c0405861327147e8dfef SHA-1: 711119250ec74e72d5ef4c965077498414e74060 SHA-256: 2ec0c2da002edc09a6bc197020c8f92c5fa888dd786a2bcd315ae158f258fdf5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'kuzutuzo.ru'. Heuristics indicate a PDF link farm and ML classification strongly suggests maliciousness, aligning with phishing or malware distribution tactics. The document body, though heavily obfuscated, contains text related to meditation, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/123?utm_term=before+sleep+guided+chakra+meditation
    • https://cdn-cms.f-static.net/uploads/4483083/normal_6029747a6e7ad.pdf
    • https://cdn-cms.f-static.net/uploads/4367919/normal_60590c7af25c7.pdf
    • https://cdn-cms.f-static.net/uploads/4385422/normal_605070ec3f85b.pdf
    • https://static.s123-cdn-static.com/uploads/4408997/normal_5fedf1b2c67fe.pdf
    • https://cdn-cms.f-static.net/uploads/4479236/normal_605bc8dbd1d27.pdf
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5fe4df10e1f3d.pdf
    • https://cdn-cms.f-static.net/uploads/4481065/normal_600ba2c188266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_28e5f924a0af46868b1b3068e8b70e52.pdf?index=true
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_d0e7318a125f4712bf55fc3ac0681abd.pdf?index=true
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_dfd78c35669846caafdf4631f293bddc.pdf?index=true
    • https://36ba0bd5-485c-4bd5-924f-6a5e18dcb854.filesusr.com/ugd/96419b_48715c0ffe824ab78e986a7c2c269d56.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf84ca2a-8243-4e9b-b717-adf039f5a5c3/formato_tipo_carta_gantt.pdf
    • https://uploads.strikinglycdn.com/files/f2c28ec0-8949-45ae-8ab7-fb132dd6c61b/how_to_charge_my_kindle_fire.pdf
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_10cef2c2ac674db8bb0acf583a890ec1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8c6baf99-6c0e-4810-a28f-51b497dcdf95/mosutupofomekoxizimaxediw.pdf
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_332d34c2a4d84396848e5bed2a51aef9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/16b2ad47-c3eb-4968-a6a2-311a279f8a74/bse_odisha_10th_class_physical_science_book_download.pdf
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_1e316a0fc6e64b5c9dbf066ae3258df3.pdf?index=true
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_badf7b05779d4c589ee0c43f9d26b664.pdf?index=true
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_ea2fc159ebac4618843c8f21c8e856a1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b83ebcc0-5384-46ce-9161-cf1070d4680c/2363011584.pdf
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_118d5ea01d68481dbbf558e980244d2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/08215abe-153d-4323-bc16-b3f00854a2fe/gre_india_test_dates.pdf
    • https://uploads.strikinglycdn.com/files/629deb78-8a16-45cf-955f-d86332b1c0ab/tonukipele.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7aa.bin
2a899d54f082497b7ac1fa5d56f898c757bf16d0a2b177733829073d63c493a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 5684 bytes
font_01_sfnt_off0000eadf.bin
e50371f3416efdfa78f985326b00362e9a4bae4629a637d1e79dbe39312bb50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 10356 bytes
font_02_sfnt_off00010e8e.bin
794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 16168 bytes

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