Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacf7ac14e5a9c54…

MALICIOUS

PDF

94.0 KB Created: 2021-09-01 21:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bef87bf3d46c00b6ab76c6e446f6b6cf SHA-1: fe5ebc8e4b1325bf12dd311bed4d0677b78a876f SHA-256: dacf7ac14e5a9c544065efb2674bb2010d6c762002500f4eeefe1b8c83bf36a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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=what+is+considered+the+weekend PDF link annotation
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16095f1b54db02---dufita.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/65391164798.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/97290096461.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/81204668795.pdfIn PDF document text
    • https://highrise.pl/file/33095637378.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ff21220b---kufujuvejorenasomugatopef.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609efdf8066ea---kekegegiwigofuferu.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/bibopiwebum.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/13560287681.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/92254423996.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f5e6c6f4fbb06ad6c0b6a156ac20d979/24571027746.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/52147124386.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8adfd9305---6750456696.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d81500831b---20895381786.pdfIn PDF document text
    • http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/2356035738.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/zaxevuvesoruxawibiravojok.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/57174362412.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/38412947285.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/kezonas.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fe8d8b3248238c26daac2a38adcf917d/zobameluxagivor.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56e76e23e---tegirovokogagonezonef.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/42349567363.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5025124ad---39466711670.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/bidokesoverodusokejofixi.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_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BE 18300 bytes
SHA-256: 3b37647449e593c277829b2a8bd3470c641a00731c95da59a187bf9f620b8f2d
font_02_sfnt_off0001516f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1516F 10592 bytes
SHA-256: 589773f7f1fe4f1d3eb20c9a2dc664cac575df2640b732241045e14b9bcb3b9b

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