Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ded759acba3bf51…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 02:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 622887a733e8478f2748a7e0953a0101 SHA-1: 3831e7ebeaac24de32acd9fd9be9dced12a7d944 SHA-256: 0ded759acba3bf5191faeebe9d7d0c58dbd926ebd93842b76cdc472ac9a289ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://hattshopping.com/admin/assets/images/ckfiles/senigozipuzizepokifod.pdf In PDF document text
    • http://avalon-essenzen.at/userfiles/file/ruxebifodorapowolusa.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/duteguz.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/wanomujed.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1843b744a3adfe1fa77f080ea973c7e7/72529894281.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c6a2b85fb97c18e2862079dc31e16f8c/boverizifow.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/jowul.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e83e3aa240---wuzowid.pdfIn PDF document text
    • http://orderkai.com/uploads/files/sadusesutiniv.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/52071117097.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/jowozigar.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/41029817699.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109031937372856.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/lalifoledode.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/1924944769.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/busukexejulidoxujote.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/xekazefafemizubogi.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/21418608862.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/27796184752.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210913073307.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfdb4f3eb4---pibevonagifodef.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/12583520507.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6d9bd98b6---14275157770.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613326eb947e4---fukuji.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/jc4r020megtcb8las5d1h3cj8t/59154514206.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/xolezifulufuselutaputo.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/zamogukadavuzuwexutobomem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=silence+manoj+bajpayee+full+moviePDF 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_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 17652 bytes
SHA-256: 92e538fd9946377b0107a3a5478c0a6b37539282989bd44cbfc70e967d4fa32d
font_02_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 10900 bytes
SHA-256: 4f0fc5121e313ee47dc3aa8bda7be0cea9009df0e8b0bec9c83063d61577e399

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