Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34d71a87a12897b…

MALICIOUS

PDF

73.4 KB Created: 2021-09-01 04:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7e5fb5135d2a55450c0d776552c5c406 SHA-1: 8fcdfe1e16570a33469206b21c10bd7f71052896 SHA-256: d34d71a87a12897be143a88c3365b490ca1b6b30e168300fcb552cc6d5875c4c
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ce1c9a9be62927aa9a9ad6ec0968f1a3/lapales.pdf In PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/e005bc27d2ea5fb4d7b030297fe13cb9/bajedoz.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/94678227685.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6bd7b397ae1febbd67b9981f31c88ef0/tifiperodogaj.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/wubix.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/mf4o7cs85c88hsa0mfckijqbls/bobotizese.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094422a41740---dunejonafoweneteradeluw.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0d1e38eb82137f01e3370c22ca4a3b02/munamoxivujeziwixowafaran.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/886b8c2c6bfeb64b05ed890fd0cb6f31/midadikofasaxek.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qcr760besm3i8n4939pbonfev5/wolaziwosutaliva.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210823110030.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/b16pb1mn8ko2p114qe7834ctnb/43754794984.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0cf894b8b---fezobalowidig.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/suzoneduzegulesepexexim.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090109022217.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210623_4D1F764CDD42BDF7.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6ad79a2aea07a216f84f4b51060134ff/63263509130.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bfe501320---pojomodowaw.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xapubopajadepak.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160831779ccdd3---xejuvuviwo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe1f2a3b5a---19986039791.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/3f03dcc1311dc2de912feeda99482bc8/90354131530.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/94e3a9c8354529f4938d765565751357/17568547031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+the+definition+ethicsPDF 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_off0000be16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 10420 bytes
SHA-256: 65a06b5f66bcf3e7f3503645fb59f6e10d14c2935f3a1e220394ce3610addcfb
font_02_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 16476 bytes
SHA-256: 8352ec5e88d17bd8a5b304b7311cd5bb8db4af2aba88243e5c01146fe64f3679

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