Malicious PDF — malware analysis report

Static analysis result for SHA-256 24817daf8591265f…

MALICIOUS

PDF

76.5 KB Created: 2021-09-20 06:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4813f5a7a8d86ff81e4d29b63321d975 SHA-1: 2772eaca6d174807a978b9be353c982b0e037447 SHA-256: 24817daf8591265f1bb3e28eba726ef7166aeefb12e20a6e767675db29734178
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=sun+tv+app+download+for+pc PDF link annotation
    • https://jnvhardoi.org/ckfinder/userfiles/files/67717317827.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/dawav.pdfIn PDF document text
    • https://gangnampools.com/contents/files/56931205655.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/644807989.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/safanojuloporivajajuded.pdfIn PDF document text
    • https://manenshop.com/upload/files/96857583569.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/ragijuwopevafudajawala.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a366d6691---31660201756.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/jimufuvez.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/92721038015.pdfIn PDF document text
    • http://citra.cl/userfiles/file/zudarixozal.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/e1fb8492bbfaef5cd46a557d9b2d56e6/xoletip.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/zigavupujozoko.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/xadugagopikozasapuget.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/jolowazataxefekoperizofox.pdfIn PDF document text
    • https://pellevah.com/upload/files/regelowe.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430193ba993---wifukivojogigejikuvibafa.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/bozimamemenezenixem.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/16951772089.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147d58903c16---vapalutudotagug.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613251aa6c880---mewupulen.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/63532655072.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/23416279334.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/zebeguzinavivalabo.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_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 17544 bytes
SHA-256: 591dc2f245c7a0b8e67c5710c4062b6c02c9fe872a5d8140e775c3310832a4c3
font_02_sfnt_off00010c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C87 10548 bytes
SHA-256: 1585889bf4f8ab66f1611ee30e580089caa710e15e4665b3bd50bd1edcb701f3

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