Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd0b97ae9bf51d4…

MALICIOUS

PDF

181.7 KB Created: 2021-06-30 11:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5afa48c1e054de8ca16775ffb4cf7f71 SHA-1: 10f916fe683b80b5129cbc83c72558696d937799 SHA-256: ddd0b97ae9bf51d40e95c265b61c12abce7acbe3d78f5479cfafa40e57ec789e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate that the document is part of a link farm hosted on compromised WordPress sites and disposable domains, likely serving as a lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript likely facilitating the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bettynblue.com/upload/fck_img/20210603/file/xuvam.pdf In PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/256076vm0sc8ikh4m5kfoh67e7/52124024688.pdfIn PDF document text
    • http://93564497.com/userfiles/resefuwudegasejim.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ff84e6935f77318b322722c0bec82f8b/bidufires.pdfIn PDF document text
    • http://wami.cc/data/files/90197625325.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a53ba63f0c8---gawoxusemo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608920805fbe2---56148980855.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/290c7ee2747f8636dc4e7a5ef56b329c/79242654948.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/zinibepirulavawakevaj.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/80111613889.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/76m3eiqhk2kbiajsuie5b7hkl4/31170772352.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/luwarorupekusujofopi.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66772818064.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d2cf6fc1ca36b3efc7dfb668cff3502e/pamoli.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1a8880d8.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/288bb19fb377dfc3fd7b996d71e9b047/ziwuxiketesurebunuf.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/49382786277.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/nilajazuxamopajubenepiv.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/54516920129.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/28813d040b38521120a39afa6393f1a4/lotoneridibujenegelu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082df04e505a---28918567180.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/resokujepuluxubitixubep.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/84951039613.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b052861a0c3---kidejarum.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959a53826ed---wapoxemituvo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6b0933ebc520425e6f73445bcbeb0ef6/41944613391.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/dawopobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=philips+bv+300+service+manualPDF 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_off00026066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26066 11020 bytes
SHA-256: 4428086602525bef0d46d6c5dba7773a0269d7456f9cf7d593a0960008512963
font_01_sfnt_off000279a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x279A2 19944 bytes
SHA-256: 7bd0678022cc09dc70361e11341d38b0d2ac89bf2af3da3b24eefa6eb8a466bd
font_02_sfnt_off0002aef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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