Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a0ab8936785de1…

MALICIOUS

PDF

85.4 KB Created: 2021-01-27 05:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 21783d60a5ecb0e17a6783a6976219c4 SHA-1: fa07539f6cd0184155efdd0cef06dfe54cfbdccd SHA-256: e3a0ab8936785de16404828129c154556024a4fa4021c88a63e9ad56cd5cae7b
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one heuristic specifically identifying a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure, possibly related to a magazine, directing users to a link farm.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=electronic%20music%20producer%20magazine In PDF document text
    • https://jetefodakulerur.weebly.com/uploads/1/3/1/4/131453332/zixewekus.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/057ee9732f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_5fe95b225973e.pdfIn PDF document text
    • https://kinurilidere.weebly.com/uploads/1/3/1/3/131379896/6b752e335dd5a.pdfIn PDF document text
    • http://widevuvi.22web.org/56672673786.pdfIn PDF document text
    • http://veletekuti.66ghz.com/letterhead_photoshop_template_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402289/normal_5fdf3506be6e3.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/79754100411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5ff389d55f013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fec340fc5810.pdfIn PDF document text
    • http://pimuxiv.22web.org/chava_marathi_book_free.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/robumuduluwise/8804003885.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/clat_2018_question_paper_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/wotogileboz.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/video_compressor_android_online.pdfIn PDF document text
    • http://vodugesivizere.epizy.com/gafef.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/firestick_supported_formats.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/cantaloop_c_section_briefs_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/kixijemob.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/redamurareviloki.pdfIn PDF document text
    • http://sumidemeg.epizy.com/29250477402.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 5400 bytes
SHA-256: ea366d9218591ebf048112d32095e04e4bedcb2540853e4c76c4b5f89671c5ac
font_01_sfnt_off00010c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 11124 bytes
SHA-256: ecd4e526754ba980446f4e236646548f91e791b506b97b1709cdbbb9e8a85f8d
font_02_sfnt_off00013255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13255 16336 bytes
SHA-256: 12aba8d421747cc7b6f64e0779b2b7b17ec51a7e5f572de6077b2104e12ed3a4

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