Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2ad6fa774874c4…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 14:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c72fe23bd03324e86a67e6b816cad500 SHA-1: abb76fc9d345b0ca407abfc0c5dd56a2dc9bfb8c SHA-256: 0d2ad6fa774874c4775831fe5837818a1645f343c564cc1d7ff3a5d54b886f2a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable domains, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, possibly leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://camara.acessoainformacao.org/uploads/ckfinder/files/zawisovujojukusuriloxog.pdf In PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/56650125000.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021941331453585.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-7/20210907160322885675.pdfIn PDF document text
    • http://skisun.it/userfiles/files/25266953602.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/84116027491.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/55890885503.pdfIn PDF document text
    • http://4bx.pl/public/file/manikoxekumisinegigi.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/11716689992.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613b16a0106a0---funax.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/fitoriredudugixa.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/73708285894.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/37178692635.pdfIn PDF document text
    • http://qwerty.pl/_data/file/85033410675.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/gakiwuvoxudoxuxepulefuf.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/69573235999.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e24727b6ab13bb87ab8b472a054d1b1/49896858669.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/zuburojigomeke.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/26913262372.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/81187231535.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/61306237713.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/49361820293.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/fajaliripozumawoxewip.pdfIn PDF document text
    • https://websbag.com/uploads/files/26394437702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=score+hero+2+apk+iosPDF 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_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 10512 bytes
SHA-256: 3a2a07b2057f7dd7d055e8613a8c25184c8f01b9f5813303496a95e1083b3ea4
font_01_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 16596 bytes
SHA-256: 74baeb41764e766c060d93217d5426ea8d313d571dccdd41d68053fe14700d71
font_02_sfnt_off00011c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1