Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba34d90f3fa7abf…

MALICIOUS

PDF

77.3 KB Created: 2021-09-20 03:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0150335191d652599cfeaaf4e729a56e SHA-1: fc65eaf022b7e547657746a6b42211b49bd8b1d7 SHA-256: bba34d90f3fa7abf25bb9e186a54ef6c806c3240b174fd09d98a360541397ee5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting. These URLs are part of a link farm, suggesting a phishing or malware distribution attempt. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • 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://queure.ru/uplcv?utm_term=60+degrees+into+radians PDF link annotation
    • https://livre-d-art.com/ckfinder/userfiles/files/46051875490.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/bejedodofobugenodoloj.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161353e9b4c25b---43094906820.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/nusovajofuxuxutig.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/megafabo.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/546207649.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/91203660427.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210901151805.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/navetanexuxitofuxul.pdfIn PDF document text
    • https://renteci.com/imagens/file/radutibumerido.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/68142912743.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/85838725350.pdfIn PDF document text
    • https://vleek.com/uploads/files/1939002607.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/juvimadavidikifinogoz.pdfIn PDF document text
    • http://mega.kz/media/upload/files/venepozega.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/4040496079.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/beburebiwowogosup.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/95588461278.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/56012551263.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161394de736f42---beniwesaxise.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8697mpatgsijlhdlrt16577n54/jizowimajon.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/59492f6d356099bad42f9689ec2914b1.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147267f4007a---lofedajujipixadomapesebul.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/acc55e2b2d6a2376dabb4a8b7e89a68f/lapowevijodi.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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 16260 bytes
SHA-256: 696aaefde53fbb63ad4d3884cc52ba5e644e9703d0e1b51a162b00ee72e2ea0a
font_02_sfnt_off00010fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEF 10572 bytes
SHA-256: b5e1fb127e9ce5174dbd8ad6d12a7f31aad96e4171b6df2b9386bb0bfd261113

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