Malicious PDF — malware analysis report

Static analysis result for SHA-256 934f688079c2741f…

MALICIOUS

PDF

79.5 KB Created: 2021-04-04 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2454fb1907100c46a1bdba4c007df397 SHA-1: 1689ba45decc6f352c7641624f14c315188b248e SHA-256: 934f688079c2741f9ec106659b3864dc283ee8f0b33163fc14a132834dea5191
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 0.9998

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://leonvi.ru/wix?keyword=zombotron+3+unblocked+weebly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5fd106e955fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_603f2bdfab7dc.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/22670768932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5fda3d26b1c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_601876e77c1a7.pdfIn PDF document text
    • http://bijukexamova.scienceontheweb.net/power_book_of_ghost_episode_11.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/zozofufulolig/stihl_ts_420_parts.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_fa57814434c84029838f35dfbc31be2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25eac437-dde0-4263-a1da-9b90b9f7a5c6/wigudefelik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17cd0906-9a43-43f6-8617-71389b1fed97/65868555216.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/create_excel_spreadsheet_programmatically.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/informantes_claves_en_una_tesis.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/vertex42_calendar_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/venture_capital_funding.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/platform_sandals_amazon_canada.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_f6433fcc5bc64681a18a889fccd883e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32db285c-55a5-4401-87d1-a1489f14ba8d/projekt_1065_ending_summary.pdfIn PDF document text
    • http://riledabetime.myartsonline.com/hiperaldosteronismo_secundrio.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_3ec4e937d7d94c1e8a435e555ec7ade2.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5216 bytes
SHA-256: 07e89439f2beb337761a5b08e1fa6cf7e845ab4d2cebc02acee51d9eb94d82ab
font_01_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 11292 bytes
SHA-256: dc8fe5f85d27944dcae8c33b70c35645fddce7676ea441207c8644d783370e97
font_02_sfnt_off00011bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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