Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0748e148391450…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 00:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3108fe08f3fc9725595751e91432c6dd SHA-1: d2b4019eb73dd8ecbd0284e83889c100c4c46b87 SHA-256: fd0748e148391450f30366b51812f6c9c29072673480ea8da40c9776701fb51d
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://detskeihriska.eu/ckfinder/userfiles/files/vageradunidaxepe.pdf In PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/27391656999.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/40818596758.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131dda34a7c1---56835665190.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/tamabibixezijor.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/wibaguzawaw.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/wipinumu.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/28116562613.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/zugezudokafepugurovumeni.pdfIn PDF document text
    • http://geasit.it/userfiles/files/zaridajuxinivabimukituxu.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/duwogon.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/47560727505.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/152a50212cad54255aa57ef3bab69781/77017738284.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/83103508426.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/buzikar.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/90178953008.pdfIn PDF document text
    • http://sentai.cc/data/file/20210913_045018_541.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/38e75cd18719886487d5bd89fe492217/18464846782.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/42764514521.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/19589510695.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/mezipivukadimuvar.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/63467049849.pdfIn PDF document text
    • https://adci.vn/data/upload/file/kapomorazobedab.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/gasitixigenabix.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/66843188640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=touchwiz+ui+apkPDF 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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 10124 bytes
SHA-256: 6ee7df4c148ee8e9a2bd01f1f0c6d3733675998dbbe9bb0a812ccc89eeaff905
font_02_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 18876 bytes
SHA-256: b67a79146917f03e8c1d59a68323f77cba48566c46608181f2a46f4d45a92c37

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