Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd293329fb42703…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 15:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f43c59c7c95262022974d50de6648b77 SHA-1: 343a0d775be17edd8ae6e58e7c454427a4dc8590 SHA-256: bdd293329fb42703f981b7ebc4d29d7b555593300148b65cd81e0618cb51da5f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The file contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The presence of external URIs and a 'download button' lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://smartraoptics.com/fck_filemanager_upload/file/85599522843.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e70556f206d---manusefegejoleboxaxas.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/kibuxosepuzofasedejewafog.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f19ac6a0e---zaduwawukanaxekamezinenoj.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/28584939875.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///puviloziwilabomazusana.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/150is5ce4d8lt67usocdv9bl0s/mawibivijobaz.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ce9dbcb9e---60399448733.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e330606ed40---kadidajuzi.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/fuvubazoripitanofoku.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/49383403533.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/990e9f8b6ef1ff32ff1a18d82e609922/29238905469.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/40859747240.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/vogodawesafubuzek.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160932fddab522---9698324765.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/2cb4bdd4c7c1f1f2955e086212ff76ee/rixitekibisibe.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/db03ee2ae1bef227afe4f938091f6199/ramitujupufuwimimaku.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/masetusefesetejazopexexu.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/36805491931.pdfIn PDF document text
    • http://talleresjpg.es/img/file/70991840302.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/wopupuwuluj.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/kugirok.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3c87f9b7a572d4bb924d84f355fcd9a3/kobusuwig.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16095af3ea7ce6---68221311764.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/jabetasonidanoditunawuxi.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/232c86ff60c9d043936c61cee94e8360/detipebowosu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffbae63b47---61111518733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=oil+fired+tilting+furnace+pdfPDF 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_off0000d303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD303 10632 bytes
SHA-256: 6b61b609cdb92fdb07feec052ae695cf8dcf1e012e31afbf016ed65a850aec27
font_01_sfnt_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 16692 bytes
SHA-256: 97dec2b8718e0fbc6ef1f9f15c574fd796f225374fe703c18cede5c9e63a5c37
font_02_sfnt_off0001165e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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