Malicious PDF — malware analysis report

Static analysis result for SHA-256 046da2f90262116d…

MALICIOUS

PDF

75.9 KB Created: 2021-09-21 00:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8726b4f34ba3e94712b2c357f89185ed SHA-1: 5b5f7690bca69f2495e542c0f481aa102f6f0b76 SHA-256: 046da2f90262116d0d628143e85c2efb2474944a446280a9b43d2e4fbcea4811
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. 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 0.9973

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://laborke.ru/uplcv?utm_term=shrimad+bhagwat+geeta+in+gujarati+pdf PDF link annotation
    • https://tekartltd.com/upload/files/bimoremivigeva.pdfIn PDF document text
    • https://cartolmania.it/file/risafevokuwulumosuri.pdfIn PDF document text
    • http://machulski.com/public/file/98074270398.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/40009728893.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/5llmrvjf91e62mfaoi14u307c9/78209417681.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109180544366176.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/36268154685.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/92780919044.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/90762446950.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134cea88e08f---77950882948.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/13831445181.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161420cff547ea---zaputubi.pdfIn PDF document text
    • http://afro-safari.com/upload/files/motibudu.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/jatapu.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/84140013536.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/69331069677.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210918084747.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/99580213717.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144854d28151---14314942512.pdfIn PDF document text
    • http://trovas.com/userimages/besivorugejuxiwe.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/57344292657.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/texowubojalufedalarenu.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/jizazawobekaniguv.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/nizanojifepepi.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/fefupewapivakufobaguxo.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_off0000c314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC314 17236 bytes
SHA-256: 59a42e13051f955e91c5ea6f8f433aedc240eff50e8543b7cd760a0e40eb4335
font_01_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001083f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 11140 bytes
SHA-256: 4912f4c8495ebedc788b12f6e0092919f5bf6e3956063a6a099ab8cb54027a9c

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