Malicious PDF — malware analysis report

Static analysis result for SHA-256 2407849e87479bcb…

MALICIOUS

PDF

75.5 KB Created: 2021-10-02 16:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 784012f2f7417ddfcbf025c9e0316c48 SHA-1: d57c45c36be2e7f1eeedac8d15a08d3dcb3d6888 SHA-256: 2407849e87479bcb41902c84c0179735a9be2ff6699dba5a75800274744971e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or a distribution point for malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document for its structure, which is common in phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://lsphc.com/userfiles/file///9697819447.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1615388c8342ef---lumikejuzofurek.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/fizafipon.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/54153190493.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/mubosaxuvi.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d2d488f78ad4be0b5c530839209d6be/81745727345.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/49841739213.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/nuwujekumakezajap.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/81621725720.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/62453842171.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/kuzekefa.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/dilefedokevenoxi.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/94161518437.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/71124931939.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/luzogirugipexuj.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/rotefavadisakojozopus.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/96086422020.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/kikizadozejamepajeduso.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/31883126035.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/15806840890.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/kisitojesijigekozow.pdfIn PDF document text
    • https://dacola.com/upload/files/45395851010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=air+masses+that+form+over+landPDF link annotation
    • 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://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_off0000c051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC051 18384 bytes
SHA-256: 7a98f3f1a1987e530d1b61d76d955a958dac479688e5d5a25bc25820bbc6d728
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 10664 bytes
SHA-256: 5ef23905e0061a7132d9905b18bd728be5ba55adf607410f625dc81990be4e75
font_02_sfnt_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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