Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3c1c02ed9a519c…

MALICIOUS

PDF

77.9 KB Created: 2021-08-02 12:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3949386249b3ef428a4b5ee8fff64eb SHA-1: 4c834b3193f9b9b57543a29cfff24ecd68325cb2 SHA-256: be3c1c02ed9a519c4a91c1bd3962e45c6f694d65b1419bdc531d363116fba7aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with several heuristics indicating it functions as a link farm on potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript points to T1059.007, and the nature of the file suggests it was delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.cddfct.com/up_files/file/53894152428.pdf In PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c58836f78ef1f3c430c85013c968fba5/71655577273.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/kowevajibolaxojorapasizak.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f084140fc---nisafeduvofubudetanuvuro.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/fd8tk28ctkj9eia1ouuo01ho74/jiketajunidimefutesubu.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/marozakef.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/gabunezote.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210723_0BAAE11C72620DE3.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd1381853---xawuruvogonukosogojuso.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/31912257169.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/15hv16p1sj40ggfq9vqjqfer52/woworosomevo.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bbe38af2e8976ce886bb8d3af9032e1a/zujivuj.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/pimog.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/dewenidapagu.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bdbb1037---fipowokisidelinidi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/6oqg72iu825j6mv5vtmjfc0ue7/jowakonafepimufe.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b368739ff---milimutasudepuxusu.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/dolebivefosebudo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec9797fe9---bedejoziregupomawan.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/pjvh978apgpf01tevrbfqc7rqi/nemexanirexixune.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bca52cfc8---43750007465.pdfIn PDF document text
    • https://campermagazine.tv/public/file/83371242931.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/kibozofufutubalako.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/56595023050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=progresiones+geometricas+ejercicios+vida+cotidianaPDF 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_off0000cd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8D 10864 bytes
SHA-256: 4b3c1e8de9fcc8fc2332a72ef88d50d6e90fa691f7108a12b3d6192486bd560b
font_01_sfnt_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 16840 bytes
SHA-256: 3bd80f3ab3818135c74b84993db9926eba70cee7d811985cbb7fd7a97ce16c58

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