Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c60e41005efa16…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 12:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 40dc137ec56249a80a7dc16d21fa346d SHA-1: 2a68510955a4b3b182bdd650c26ba85786958e17 SHA-256: 29c60e41005efa16fe55028e821ddb2a47de2b108d42c0c43569afb1bd9ede3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ketchas.ru/uplcv?utm_term=how+to+make+commands+not+show+in+chat+minecraft PDF link annotation
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ea2ab0594d8711db31b490023a408496/35309371041.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/08/17/dixakumewevuvuwojub.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/83591861395.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/kugifowubitosunokotur.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/f0b8f3e534f1ddb0bdc8451a5a116a97/21616395422.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/s8odlk1nkmpbskc3f6o6n1im9t/dixakofixuje.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3gp4qia52hdvmuaa928cilb105/tovexaroserudalafa.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ca2475fedf8e8f915621fe0462848ade/gonut.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/bepoguwefanaki.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/u0mogfifp0mvrgiqistt4evl95/kazipepug.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/fujefawizi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7ed5cac4d---50626551790.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/iuok7uajlp35n5k4l14gcq9f28/68117400274.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115d86f2054f---lezumogesanewubeb.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/74012886482.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/dotifaniwum.pdfIn PDF document text
    • https://giustofiori.it/file/liketujekivuri.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/wedanunurumozo.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098408e6589e---wupofogugozoxivapaxi.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/6639405424.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/91e2ba11920f4a969b07707c6be7a68a/60206227266.pdfIn PDF document text
    • http://bociany.sk/media/file/xofimorikeregiz.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_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 10864 bytes
SHA-256: ea31273382340e672f373ab4febcb86a55db4a014b34cbe6bd07ec5842a09dc5
font_01_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 17380 bytes
SHA-256: 09b76abd7db5954f5a61637e6067c1d1d51e4651fbcba0177bd90b057740f99b
font_02_sfnt_off0001124d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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