Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62fae2c254dd688…

MALICIOUS

PDF

88.1 KB Created: 2021-07-28 04:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7f8ed768dcf52a7fec6d06e49011a151 SHA-1: 524496689ebbef9b8e38fb517abe86e74b074280 SHA-256: f62fae2c254dd6886420bf57c87ce50f1ff840a81697af8a7f40837ac3d916d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/406be117fa488dd347d31bf0cab282a4/19651483701.pdf In PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5826509f93---fofiroxorabovanisix.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/lusumegosavolepogobafali.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90d702b0b1---waparotimobinuvinibef.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16072807f9e646---82190007338.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/88729101003.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beaa24a8ec---82260715712.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/mudovoz.pdfIn PDF document text
    • http://sam-global.info/files/file/95973509506.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/r59e43dbnmnrhrg47rr34050fg/fageravafiraforug.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/24393594001.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/86782007679.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a992388ee67b494d27e6b67c6c4c44c5/29159783899.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f36d253cfdb---62738527111.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210726_020542.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/j3ms3j1jndntg3em3aemnnmpk5/kakevizek.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/nibigiru.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/bubukaburaputisepe.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607836c0497e7---tadafelimujututexaju.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fafcf300ae6---zipikogoj.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/kewukonowa.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3e67a4bb---26971947176.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/fde6f17ac8ddb43df584a92e80f9f383/boleluvaxufutovomibora.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf637cf73a---47640693912.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/85226402235.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/32980513044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=are+there+any+free+find+my+friends+appPDF 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_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 10692 bytes
SHA-256: 9df19a505e08e9de142a3237c143d3d2073e3fef8ab778aa2040ed7d772a7b47
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 17072 bytes
SHA-256: 29aabc2cb0a26e55dc0ec790da68ec6cecdc1a33006991f135dccf4f42483043
font_02_sfnt_off00013879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1