Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfbf114c7087a9b…

MALICIOUS

PDF

137.1 KB Created: 2020-11-18 12:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fe11bd70dbd216d838bb76fab3387191 SHA-1: 90a5b4a15c09ec0e869e2a38e7bb4867bf3686e5 SHA-256: 9cfbf114c7087a9be0b5d5087386b6a3ffc1a40aa9f81835c59e8cbb8eae326f
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 0.9995

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/aws?utm_term=south+film+ing+movie PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/bazarerin-surilugajexu-jusibut-jopaxig.pdfIn PDF document text
    • https://xapawijumoj.weebly.com/uploads/1/3/1/3/131379373/a19f7d2af3d95.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/welanisowari/brgschaft_formular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90cedf8-0848-45a2-b3aa-a0fd56294ee2/college_football_rankings_2020_top_25_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b37a659-5807-45a7-a855-84b4642af064/ideias_para_fanfics.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/lafimujumetewuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1d40d5-2e95-4639-a43d-829782d5014a/zakubizijurevaxivolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5200137-2ad8-468a-9ae3-dbbe34278c3f/apk_bounce_ball.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/81623653230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8716b0-1fb3-4ffd-9421-458584310ad2/91485348178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58150617-2590-4f3d-8797-df2b9e9b01f9/gikagiwasuvovopafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18935 26876 bytes
SHA-256: 0c5a3d81859f0024ae209851f25b1cf1b20c03da4dca746a98cb60b8361cf130
font_01_sfnt_off0001d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6CF 4860 bytes
SHA-256: 21c96b19cd42a8c20e84feec1cc308a2d00a0fb201e41864e8ee34e25aae54d0
font_02_sfnt_off0001e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E748 14320 bytes
SHA-256: 4ed098aa5435c51a297915b4db1eb6d71044c57f59a3ec4e5df061b7d76dec47

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