Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdbe109de188ed0…

MALICIOUS

PDF

90.4 KB Created: 2021-07-31 02:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca4c04d2a67d1d34fdcfaa9b1023a676 SHA-1: 5a1805584cadb72102217b9c368a51aa7e22102a SHA-256: 0bdbe109de188ed0e14bfd1a347efc159cb8012ebb7d2fd23c875a5b426f55fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains embedded JavaScript and functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=reviving+ophelia+movie+ending+explained PDF link annotation
    • http://i-daa-wl.de/userfiles/jizugunekalani.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/24697312113.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/hd3u7dvagbmsumfj33fe93k031/laxomolefijekapu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/0svgalmacuavt18jctrubudv4c/13888916868.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/e4fca5acf0dd637f15f491517ecf4786/tegapabakatefijivuniva.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/24788430650.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/ramax.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16103088ad370b---menirinodujekalezis.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/84255419628.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/zegupifib.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/73604936618.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/80941352368.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e16473d96---pidimikopivokiniwererope.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9549f948803578a51e7e9aeb13347a9d/69649260071.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5de2nqsrtimecm1p097bbcb6hq/85626311777.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/peviforazuxosinodogixedas.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zowosulalajabisimolazopuz.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e4ba9a91c9558a053e6612590b133482/witapanisoxorixa.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xawujasagonuzafadu.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/84179600049.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae00bd7bb2---30611615828.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/10056103232.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/wodetelaset.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://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_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 16560 bytes
SHA-256: 6627b8ebd8b518f716b991f8a2d923f8ede964638a72490f578f3c46f2d46fbd
font_02_sfnt_off000143b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B3 10688 bytes
SHA-256: 4a33cd4325297a7c19cf23b425b6eb134046b53d2d714a16d060ed80a4119de8