Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbedcadf4f9fd64…

MALICIOUS

PDF

95.0 KB Created: 2021-08-11 02:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ca7bd39aebd7884d016ca84b12b215ae SHA-1: 75600a292ba980bbefb760ccca78708363785e93 SHA-256: ecbedcadf4f9fd6440c6fb3a35e66b49537ad586f4d84e037fd0e50fe3405b7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites. These links form a link farm, likely designed to trick users into downloading malware disguised as desirable software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16071f56eb1351---ledis.pdf In PDF document text
    • https://eniedu.com/data/file/20210807153547.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/begefiboropexoroduwaman.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0250a3f6e9bd02db3f8bc330ae9708dd/49862327361.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0aa155c91bc1df3a22755eeba86e6eb2/vunimexixefapi.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/64825735335.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/39489944822.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160989adc4986e---46251269380.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/8fo3fcv0ri53qfq44d3ovst3e0/13174201800.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/rukodanusog.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae679993952---47045767561.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4584483810.pdfIn PDF document text
    • http://1careglobal.com/upload/files/mamudezofa.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad86d83f0ea---xopipapanomebepi.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/63169312265.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6369f5e40d4554957b14dd3bfd6f84a4/ratidelagedazamosuxawa.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/zujunaxomuwolazisi.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/90225989800.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gm9mj7b0ap9e1akui4fhavr2q2/karetasog.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/woduzigolesoj.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4fe94ee52c0609e22ac66d650b52a114/81614118003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cs+1.6+crackeadoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00015180.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15180 18292 bytes
SHA-256: d64916868dc93edc76be16c1b771bc7108cf3373e2180ff7ee380e46a1f21b36
font_00_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 20892 bytes
SHA-256: 046930c18cc6f03fe1a93400ef9b25d10870a5f4eb1fb279b2e65ac0933b632b
font_01_sfnt_off0001218e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A5 10432 bytes
SHA-256: 3af52aeb47dcbdc433730b5f65801be6973f2d9d91359201e6e2ef840a1e070c

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