Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea3fae5f4400525…

MALICIOUS

PDF

73.2 KB Created: 2021-09-20 18:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 806f950b742810dca6e98e7af203bc36 SHA-1: acca6dc8c54c84af86e9f219a496adfedde95f0e SHA-256: fea3fae5f44005254e41ae1094f521004120ad7fd5c04ef319d0dcfc28e7aea4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://laborke.ru/uplcv?utm_term=gogo+live+mod+unlimited+coin+apk PDF link annotation
    • http://cuanhuaabshanquoc.vn/files/jamaropodukurujomawezomut.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161455b7ee686d---80541360666.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/29166312098.pdfIn PDF document text
    • http://hopkim.vn/upload/files/60717069615.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/48494165291.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/bajemikosubusobi.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/61728303718.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/6537366812.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/8493803072.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/nabkaoj1dq20h1e2nqv4tb1e97/bifadewubopelizikekaki.pdfIn PDF document text
    • http://indemo.pl/Image/files/menopuzefinasimoji.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406307d7d19---88259787764.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/36130243165.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/52638193888.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/vudufasokegufodewedutewo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c37de3f4bc---60162405709.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/27850620951.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d19e4db96---3672070967.pdfIn PDF document text
    • http://ranjoysarkar.in/FCKeditor/file/sebiwu.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/77687015622.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/65096146035.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161427fb2d0480---6559421334.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/laloxudipowevivotevu.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_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 16780 bytes
SHA-256: c2d0a1ad7a3f67ce3fd4aa57e4e12bef94ab1fd23cdf3e8d86bda9f50a4cb389
font_02_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 10888 bytes
SHA-256: d7319f62aa2e45b0fdd4f0cb2a9276a70e5707a0fbe4ffde92631e8fe0fba47d

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