Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d5ba42ccd87f62…

MALICIOUS

PDF

174.5 KB Created: 2021-09-01 16:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1dc8e36b7c21b7e1db173119ec0caf21 SHA-1: 171a37aa0454ad9960292bd10270a432e708e660 SHA-256: 85d5ba42ccd87f62e763796fd6aeb75abcbefde11b8dc738a05f20c97fde8114
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload storage or disposable domains. The primary purpose appears to be directing users to potentially malicious content hosted across these diverse URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://kurpinar.com/img/userfiles/files/77157278142.pdf In PDF document text
    • https://wineuniverse.us/userfiles/file/vefudirifilifipa.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7dc6d98dd---nolabefoxepikosenures.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/80489349868.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/37493165661.pdfIn PDF document text
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/xiwaterawewuvakunada.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/419eae152d619d868952054ad67bbd63/46674201829.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zufizakomatosaso.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/87654093516.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/11972060498.pdfIn PDF document text
    • https://davnosti.ru/upload/kefekugipej.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c39ed1182b---tebinaworaxipuvifumovon.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/s9ffd15va7gg4hlbl19573nlk4/zopuv.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/mabetamise.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/siviruled.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/95032e34dda69c86afca591787ee9fe7/84987185408.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/lifizoginawolobate.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/tazilitaxapazitovezan.pdfIn PDF document text
    • http://liily.jp/upload/file/20210722114915.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/17944575811.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/35113767202.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/mijadopez.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///202106027568_899231940.pdfIn PDF document text
    • http://nenorm.com/files/files/19221231222.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f3063add2219b8b0bd4e6f192ec1a80e/1771695222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dust+in+the+wind+tabsPDF 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_off00024568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24568 20776 bytes
SHA-256: 1b18327c0532ec58408612c983ab585b58e61fe152d9ea11d56cf57d92c55fc9
font_01_sfnt_off00027a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A8D 10408 bytes
SHA-256: 3168e7ec920783f712bbf60ee104c383440415f1112d7a8c185601926b3b29cf
font_02_sfnt_off00029225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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