Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e824dc87467be6…

MALICIOUS

PDF

71.7 KB Created: 2021-02-13 16:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6648b60b041a9e11f2b15a930d120553 SHA-1: ae931abd313cd7eb52c7f82cf97a10926f78e85a SHA-256: 93e824dc87467be615d3640f409b762acb7befec4d4f88cc3ea9d3e22c604f25
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://druttle.ru/wb?keyword=board%20games%20learning%20english%20pdf', suggests a lure related to educational content. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

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://druttle.ru/wb?keyword=board%20games%20learning%20english%20pdf PDF link annotation
    • https://zemotoru.weebly.com/uploads/1/3/2/6/132695551/gapilo.pdfIn PDF document text
    • https://jegiwagoxupida.weebly.com/uploads/1/3/1/3/131379361/2208745.pdfIn PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/f7f9def30ad9d.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/gogibaziritezo-wekiwom-surupusaxu-fodugifevozog.pdfIn PDF document text
    • http://fullpisetc.ru/kewaligugudogomi50wy1.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/kosomabowo_koferud.pdfIn PDF document text
    • http://findssldz.xyz/52442273835swboe.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/itwicih/80356118910.pdfIn PDF document text
    • http://cooldomen.space/sorepilakujotozasg1upz.pdfIn PDF document text
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/7df192.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/gimisorixosu/gumalofojakanor.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/zizawox.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/37288122986.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/26871149351.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/20611246630.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/florida_keys_travel_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/box_top_collection_sheets_50_count.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/sazasipitobipijalapem.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_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 5504 bytes
SHA-256: b514dea09c11bc3942fcce60fbb1bf873f8dab604cb449d9a1f463dca6c9b173
font_01_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 11188 bytes
SHA-256: 81ae12c289cc40ceb6b90112303b7b6e11c7f0567a07719c37590f11e071043a

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