Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc949c6e6feac1f…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 09:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f56ae9137d6ada934df91339c04edb42 SHA-1: 7c2064aaccc9a9d495aa67dc7bf7cccf9048be9e SHA-256: 8fc949c6e6feac1fdaa499cef3b3576ddb89116f2e7647c1a9c5c9098bc4f6f8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. This suggests the PDF is likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=cbse+grade+6+math+worksheets+pdf PDF link annotation
    • http://md-servicios.com/userfiles/file/namiganoguganinivim.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/07/20210719181142.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f560d449f---82251197940.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/86h0iqvqs7kg6l8iue9aerh9c3/xituzokano.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/b02d8a23d91441642bd7e3d3f475ce98/tunidalokavokesilesunib.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/jotozidikowajoxusu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/hb7eqq9lqkgh1bll8kuo576q63/juxokulo.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/20807829718.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/levetixo.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/84613742828.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/95222977120.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/43695783841.pdfIn PDF document text
    • http://mega.kz/media/upload/files/8590633874.pdfIn PDF document text
    • http://recrute.fr/files/files/23077188529.pdfIn PDF document text
    • http://grabnerestriche.at/mujagozevulemese.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/51149049277.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/5aec06725fb0f33c8410f053e178d49d/wavovatefe.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611565e804aa3---xejajobikukovarirazugebu.pdfIn PDF document text
    • http://alkanboya.com/files/file///96913264050.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/wijawo.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/gibapinugajigu.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb88684247---66718898282.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774be18cefd---60720814489.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/24166283378.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_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 17364 bytes
SHA-256: fe3c2ece3d3b886fc992d3b9d8d16ad4d286b40595a603598c8371738006c639
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 11220 bytes
SHA-256: ac6a58f87994f6e6dbc0d9f60bb2c1d31cff47f62ec0e76fe5e2b2261a05804c
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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