Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ac3392756a0e72…

MALICIOUS

PDF

70.6 KB Created: 2021-09-14 09:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc9bd5c00662bd61ae348ccba35dd9d3 SHA-1: 6dc48ed0c3482d03f6e47c72980263bd70863969 SHA-256: 14ac3392756a0e72acb4c236bb089547d2d2ff1f365d72a70b350c23878c0314
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the presence of many external URIs strongly suggests the document's purpose is to redirect users to harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://wastran.ru/uplcv?utm_term=how+to+restore+deleted+voice+recording+android PDF link annotation
    • https://godahoian.com/app/webroot/upload/files/jukudid.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/19627954774.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/13563884732.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e8d0691f---93009311846.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/65980226712.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xuguvo.pdfIn PDF document text
    • http://ty-int.com/files/files/93176222132.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/37861715863.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/tovexarujonufuzositujekog.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/63826041918.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613335d74c61a---78248382682.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/tuzomelomorugejatuzewivaz.pdfIn PDF document text
    • http://stisk.com/file/roxufozubosefale.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/71201788905.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/jimupilegosagazedito.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/3940812115.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/79247326030.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/20330133671.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/32181436095.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/xevipikawaxiwipo.pdfIn PDF document text
    • http://faradbox.pl/files/file/20082407843.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/lalajebezu.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84926821161.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 10688 bytes
SHA-256: e49f52fde6c451e36b2f6db3987bb56754310eace767e261153e3e9297f7ff85
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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