Malicious PDF — malware analysis report

Static analysis result for SHA-256 0410f218f72ef2d4…

MALICIOUS

PDF

72.0 KB Created: 2021-08-27 21:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 47991b34775d98aa5328d6ad86175316 SHA-1: da369de504050c510f9d44aacdb9f17ff1af4cc2 SHA-256: 0410f218f72ef2d4cc66c01053ffa74a20e6063c1e87bf7e66b9800098e7a580
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of multiple external links indicate an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://aquafilling.com/userfiles/file/66413121661.pdf In PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/tenagolezibodeguzugaxak.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ba10de75---boduboxozatonatemafogopi.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/36688554066.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e0fae7a27---mowemivumizerewuguribus.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b14116132---22580998107.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03c6a5c1f---58704267414.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/buvoxowazejiduputimoxi.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/63724942903.pdfIn PDF document text
    • http://getvisa.ru/images/File/46991800870.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d472accce90---20713824153.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/61140607753.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/seligixos.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/pefuge.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/kozotibuzakugetevuvelupo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0eb87bbb---towuv.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/15537821102.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/ragabufavupe.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/af701a7f3f89457bfaa77a6aa491566e/43113180959.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/vejojorotijuxepes.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/pepuwijegofukerataf.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ae3b2847---vitalimuvijug.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/92159016730.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/rujej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=play+date+mePDF 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_off0000bdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD5 9940 bytes
SHA-256: e424b46b55a117e38eaa5e3290c4e5ec9dd34688477c910290e5eb3966dc5c83
font_01_sfnt_off0000d3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 15232 bytes
SHA-256: 5ac06d90dd3a08ea0bbe7c66b54f130d2d4a4dbd8f01bf34006900853c689af7

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