Malicious PDF — malware analysis report

Static analysis result for SHA-256 1264b50f963da4ad…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 01:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6dea0d5f199fde4511ed27f5a33446cd SHA-1: bf8a460f1d5f969d438ef701126e95dea93079a9 SHA-256: 1264b50f963da4ad35c69fc808fc945b5b8c50a10a4cb6cf3f4f72ea472dcb20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF's structure and embedded content indicate it is designed to redirect users to these external sites, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/uql73d287opeooc8hmntjus7a0/xuzenubumexelewemanexo.pdf In PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/2f2e13ce4ffc1fa5dc3703e9d6ab4b83/lunezoka.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/tonukuragapesoxakelumopi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3592d25589861bc558e172085c11ef84/zudesowonafitafetiweza.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/2rqvqsiicman9n4h7ao717d1o2/relewuripipafugivobigagin.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/601270423.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/nozevikujogigizuk.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee218ba06a---ridupugo.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/16970528306.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/65135780432.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160884ed74d248---14804633334.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/81336361152.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/sutikole.pdfIn PDF document text
    • http://safarang.com/basefile/files/fexisunizujurab.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094044dba92c---75579223466.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/30951838150.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/p6k34jvnv1lhiqip1ms0rchj0g/xobifukisasajediv.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/wasorajagug.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/82499231972.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b0c477d77088b86bf7a1c6e652163219/funewozepotimid.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161069f1dc61e2---mugagumaxem.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/16dggfk4av3rmi5um4l6b54otr/kasapeb.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/bojibapuxefetejaju.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d9d4f7d3---kusugafisozunutaxewopal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=9th+class+science+notes+pdf+downloadPDF 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_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 17304 bytes
SHA-256: 652b722dd7354f2f053c3960d478244333239abbde78c28924b81d1e0d8fac13
font_02_sfnt_off0001315a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315A 10772 bytes
SHA-256: dd216c4aab6327161715b7552a9317267e5d8ace5c7cf2b2d54538dbf109fbf5

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