Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2a805cd36627ec…

MALICIOUS

PDF

90.3 KB Created: 2021-06-28 12:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 45867b5cd311449dfe21c5b2469d8f1a SHA-1: 6b1de2a0969984a3c854dafae3bba332f5118ddb SHA-256: 7a2a805cd36627ec09eee8f578c5fd970be116925a93454f2dd91d1ae111552c
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/61706fe32f95b03fcd1c5df1f048c6cd/zeboxemixulabiwumodexe.pdf In PDF document text
    • http://bhs-class1957.com/clients/35434/File/91471441934.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/nasuvapozosisugunajamov.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/71155750600.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/c1luou8rifdb4mtdofh5bihkc5/38781040407.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/23272426272.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acb0500e32f---livekapudiluwavutul.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/7b6e0bcc45997c3c89acfcdf8aa774fc/bufekorirofo.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609421fe0d5f3---gidapapevitalukuv.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/82492543065.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087713abe1b1---64071797735.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/31527911308.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/58c0bfec1aa6d133749370e8676ce898/juvefuj.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/7eaed08ed21b1f5655cdc377965fc4c8/79858632649.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/33512558735.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210529011250.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/jupokegebonumadenini.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/5d4b45649f6c014e8d354468ee724c67/14202547467.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/jafuk.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3598411d---49911532830.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/454986700609c7677d20dc.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/tifunidanekewizevitum.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c6d362466---70792486150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=on+eagles+wings+lyrics+and+piano+chordsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10920 bytes
SHA-256: a5200b56db156b9f45bc28a4d5db28ac6eb1b8b0446de363e4c0cde92638c4c6
font_02_sfnt_off000111d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 16236 bytes
SHA-256: 9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40
font_03_sfnt_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 19768 bytes
SHA-256: 5b3038df6dfdcbdf7375077e60655ad072d2a723932851cdb039c99d08d54494

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