Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ee608c0ffa302f…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 08:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d29bb9deb96d43031718b4d7df340aec SHA-1: 60b0abc03d3b2bb86fa7e80cb71a93003f79b1bb SHA-256: d7ee608c0ffa302f90fe29670f4a2c8727d151c6bcb0a44d7f39028b657598b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload storage or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://altadirezione-consulting.it/userfiles/files/40217251723.pdf In PDF document text
    • http://bbfederico2.net/userfiles/file/fasojigemoj.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/87160285908.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/78766261980.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/72807271589.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/nabaxefura.pdfIn PDF document text
    • http://cncsprings.com/d/files/27415841394.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/23409836311.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/64773250357.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210918084516.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/junaguzumijonikerijir.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/46908697736.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/robesatisuvaxuzagit.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/68782583454.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/62988914615.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/biwojoxebipa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410df209ab2---sisumuxexipigeditaxe.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/40927321080.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ce2855e90d9767db8054c4c2b9ca1c30/fikovexanuzezisunuwawon.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141dedd9e015---15115693002.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/letimepikomuzez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=xvid+codec+for+mx+playerPDF 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_off0000dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD02 20692 bytes
SHA-256: c10f0e9ebd0e1000a16fb7adf80568c548c8f38b7fb50683c071ef8fec7c9602
font_01_sfnt_off00011296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAD 10700 bytes
SHA-256: f13c0c5a69a4ebff84575a0ca1b1c6d8ad231282cbba2edb0d4941247aab4e87