Malicious PDF — malware analysis report

Static analysis result for SHA-256 2975654e3ef466ee…

MALICIOUS

PDF

84.7 KB Created: 2021-09-18 19:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42d6353d5d10e4d5a82427d6934c9211 SHA-1: 0f098f07795ae8b0bbf87fda0e36bce23f1cc44e SHA-256: 2975654e3ef466ee393bae3a85037d46c84d897f448969216727902d451102f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://banglenhospital.com/UserFiles/File/lovom.pdf In PDF document text
    • https://weyergans-hcc.lv/userfiles/file/xipujunuzatutegedakogelek.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/kamilitotis.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161390a224084a---32435570983.pdfIn PDF document text
    • http://denge.aero/upload/files/duneterarolu.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/jupak.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/57386068613a5b5b7d500.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/85847837556.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/sumigigexazarejin.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/31463149143.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/rekilesubi.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/xuvizebisizud.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5a3dbd309ac11701334f2e154a9f2b49/pinajimewojumalubipoju.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/nikofuvatipofuvasesil.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/wupivotufijid.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/worijevezobidebipe.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1630711031_1.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/90f74d8ba7d4edcdfd7753c169f05083/bugefekuwuxunedevagibo.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/duwolijulikuzozoma.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/64976376761.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/5083152950.pdfIn PDF document text
    • http://yanartextil.com/firma/files/vigeg.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/1287970549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=smart+tv+apk+download+for+android+tvPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 10676 bytes
SHA-256: 26026bc7083897890ab575f50a72fb4728e00bcbefd879b988c8f27dc3d9e193
font_01_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 18080 bytes
SHA-256: 0182a6db4c9acf6ff598502e5b93593a6e1f861a26a894f678b57dbef9a87145
font_02_sfnt_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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