Malicious PDF — malware analysis report

Static analysis result for SHA-256 06472c62c4e8c89d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-09 19:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 511d8dd142dd1b6af78b8dd69f54ae72 SHA-1: 22fae4fb9a1eacdebb8b24838e25e78e81e54eef SHA-256: 06472c62c4e8c89d80b99d02ffad6ce5a3edfc3da3a528481aea2aadafc54c5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, forming a link farm. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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 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.
  • 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.mousumibanerjee.com/fckimages/file/66307277785.pdf In PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e696db22---86616488545.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356548b8ccc---vapot.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/87998797796.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/6117259906.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/ketisuwowigudalidon.pdfIn PDF document text
    • http://104408017.linker.tw/files/jewasokexugumosuvawik.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/finisojarafoxawakuzi.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/xenokaluxifaguboturaderep.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/40597527266.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/61569814051.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/8b9a65edb947bfb0e70d2e0cfe4d32af/21110102940.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/rogupatok.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/3069716992.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/cbed57f0059a17e6356fc171bdcd4100/35609778700.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/70741995466.pdfIn PDF document text
    • http://446888.top/userfiles/file/417531745.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/rofovuzu.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/12481294877.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/45119444269.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/15310859353.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/puvisamabu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161388ef6bdd6c---nugiwekuwar.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/93300173340.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109090305004581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=reemplazar+aplicaciones+del+sistema+androidPDF 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_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 19528 bytes
SHA-256: d3ac7c650c2421a2248bb4fb2cc48f6133be922e2840da8d52a7bb762cbcabe4
font_01_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 10780 bytes
SHA-256: 5f52fff624e4d8623906fab6736d4068cc81f92b922d55b8ec8d97ebd4f7aeaa
font_02_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1