Malicious PDF — malware analysis report

Static analysis result for SHA-256 71708acdab40c1fd…

MALICIOUS

PDF

96.0 KB Created: 2021-09-12 08:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fc40d3081bffcfdfd3b0ad0f661e6e36 SHA-1: 54e4bf22e9b0756c8208cdf3b2cece3e92411c0d SHA-256: 71708acdab40c1fdeb8e1c8d3a738cd6c2299fd5041a488b142834de3e83f049
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple domains, indicating an attempt to redirect the user to external content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS (T1059.007) and the nature of the links suggest this file was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.gonouvellezelande.com/files/95653800699.pdf In PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210905164406.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135311b6a4bf---98413604927.pdfIn PDF document text
    • http://apart1day.ru/file/85553428351.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/59868648756.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/65546451849.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/73195544126.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/1880000689.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/46491977939.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090304252190.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/janibiwozipunujigagez.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a358863dfc19c3dcffa531086dc7ba5/dajoxix.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/woxapegasabidakogipesew.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4e6e0453c---norugekojirebib.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/tasixuxa.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210902150533.pdfIn PDF document text
    • http://marketingnews.fr/images/file/18314291919.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109020321147214.pdfIn PDF document text
    • https://31app.com/userfiles/file/sofojovozifuzarevoxi.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/60361552884.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/tivopijiwonitiduni.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/tidikaduzilixotabi.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/47434734463.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/sejanomoline.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+instagram+followers+website+2020PDF 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_off00011083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11083 18416 bytes
SHA-256: a3883b0ef447baf1abb944d785cabb542ce616132bcf320ba7a0c948a5effcd3
font_01_sfnt_off00014066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14066 11000 bytes
SHA-256: 8aa0de8c1098cc37e2fc3b90967d52793a93449a6a5587a947f2dcc7636ed0d3
font_02_sfnt_off00015a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.