Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b025414e6ffe05…

MALICIOUS

PDF

92.2 KB Created: 2021-08-04 10:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8523252ee48c7ba9695b7da71dceabfd SHA-1: 925786447491e17d4a8824596454b717eb12f70d SHA-256: d5b025414e6ffe055142a1babbfc44b4aa6c597ab02d92ff6954c3dcda9d6ac1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of link farms pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=behringer+xenyx+1202fx+effects+list+pdf PDF link annotation
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a25c9740---14573313563.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b4369b695fbac9a53d8cd54d26b71079/pojivodisarapepe.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/vugixodopugaxux.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/h6b4iheelv44or1ls5vlkn0vbq/zazagigerupudikikujeduge.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/hr3o87p8urcdpp097l100r4jk5/lururokuxire.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/gitukananibirumalekovudu.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/94103804417.pdfIn PDF document text
    • https://ebooksweb.net/files/file/20699050034.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/190128770.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/dalumefawiwo.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71704ab4cc---2905303408.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7cf573f1324f4555a44032f23a58193f/24649845250.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/607c45c12d024ecde591be147e3bb8d9/92193237876.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ab790c6f32d---20069625228.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/48796636116.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/2339980856.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/ditubi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ce07d9c2---20101138642.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/54864385236.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/zanujebokobubave.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b82945e48b---midotuxasiwodaxujuti.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/juzibopisonox.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210705114338.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1a6d2364c---pexamogid.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/vopejirutekomokotemu.pdfIn PDF document text
    • 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_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 17628 bytes
SHA-256: d9a5e1610d95bc1a2ea97c3bfd4413db35438e10f44fe191a80d24f69c4c24c5
font_01_sfnt_off00012d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 11180 bytes
SHA-256: d063b00649047860595d172023e1aa67cfe50153da0d170f48fa135321de8c4d
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.