Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4614baebe11bdd…

MALICIOUS

PDF

61.0 KB Created: 2020-11-10 22:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 74be4605061d6703757f06f1b29e2faa SHA-1: 9204c332bfaac1d7902501f1ddf4eec2d5cb43c9 SHA-256: 4b4614baebe11bdd2b50ad1ee0635b27221464274929810e61c47a2fd987fef2
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 0.9996

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://traffking.ru/strik?keyword=solo+le+pido+a+dios+letra PDF link annotation
    • https://zewosesivate.weebly.com/uploads/1/3/4/5/134591998/wutazanupevaju.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/telixo.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/tudawufed/8965774209.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/lelebejugetige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50422944-3201-4eee-90c0-330585b4b966/modadexamonev.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/65790967608.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/binasija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c78f348-8109-48fc-aae5-b6292557ffaf/wukos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1dc0ea-e3f6-4f6a-a052-d05af8ce12ca/70319444398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2ac3c1-eba2-49a6-8ed0-1c110fd59c3b/82831927732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cde2416-c4c9-459b-98cb-33cdbeaf3f6b/kotuxivitibuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7552e3-d871-4bda-979e-69f097b4952c/14906601325.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/58671194710.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/citizen_eco-drive_watch_wr100_manual.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_off0000b1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D5 5056 bytes
SHA-256: 842b86fdf195777b705d9272e7db406340d89bf4c2460f4f1d1c442c211bbfaa
font_01_sfnt_off0000c30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30C 10776 bytes
SHA-256: 1ae70e4625764a8589c055b63f8e01ed367c660b3ffd6aff7e37b359afd3932a

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