Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e394f52dd4a8c18…

MALICIOUS

PDF

58.2 KB Created: 2020-12-04 04:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7c96921a821b9d120023774ff41d2ef2 SHA-1: e4b1e6f4d423cc328387490cba794b96da6f0c9c SHA-256: 0e394f52dd4a8c1855a7f0d520da033be2ff2b63b4ade9f9c66ac3d54f425381
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to redirect users. The presence of the URL 'https://traffine.ru/aws?utm_term=dfeh-+188+cfra+form' and multiple other unknown reputation URLs further supports this. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or SEO abuse.

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://traffine.ru/aws?utm_term=dfeh-+188+cfra+form PDF link annotation
    • https://munulibur.weebly.com/uploads/1/3/4/5/134508804/cdee4b7409b6b3.pdfIn PDF document text
    • https://fivakamine.weebly.com/uploads/1/3/4/3/134384559/kipusotavav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c7a140-6652-4198-a65e-c409244f90cb/vubegojopuxigupasome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6b225e-df64-46c6-ad31-376e2e24d10c/harbor_breeze_avian_fan_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/40025860638.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/legiwamat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38305f72-c566-4adb-bca6-4c994d0372b4/13696227769.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3eda4e98326c02dbda74/1606303451956/naworaxewojugisinoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2d1b5c-9ece-4375-add0-b7da7e268510/28031978501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ad5a75-f565-4b12-961f-12d65ab5fdf3/86365250963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8dc6df-aaef-43b4-88a0-a5329076f940/sukek.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_off0000a91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA91B 5188 bytes
SHA-256: 767463c87e8eb7033810067d3d1602da0165b147831c1f9d7d7ec88d17e60bfd
font_01_sfnt_off0000baac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAC 9492 bytes
SHA-256: 206743a81960fef0ec1a6c2564ac1eb9743bbc90b991198795d354e91cad8b3d

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