Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02b1ef30d0bc003…

MALICIOUS

PDF

80.2 KB Created: 2021-09-18 12:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd1d66c875baa0fb652678aceadb449e SHA-1: 0c6bbda4a7c2f45d7e18237628e78dfbf9b01c34 SHA-256: d02b1ef30d0bc0037eaadb0e45c2887064ae521990c36d68e3a3f51415092319
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 numerous links to external websites, many of which are hosted on disposable or compromised domains, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure point towards an attempt to deliver a malicious payload or phish for credentials.

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 http://theofficeplus.com/userfiles/file/doweguzutapujizanisa.pdf In PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/zikureganizamavul.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/ronetuzofukimiragovom.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/33480498017.pdfIn PDF document text
    • https://membermimpi.com/contents/files/sixeguduwi.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1822aaa96---90071452074.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/kisejosukivovujuxafipoz.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613252e73fa8e---juxuzof.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/97002344907.pdfIn PDF document text
    • https://windsbs.biz/files/file/kekiv.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/juwavodujupexeked.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/sovemorerixagolele.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/61002049044.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109081953065461.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613549b3efc3d---mulomobuwitoxuzobaju.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/12752245814.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/gidunivelu.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/6641309473.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/gunokepupemidozibefoxero.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f986b4ae1a---kusirejopopobujebavujed.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/msertr80ecvc24vmuugcfv98j7/46872131997.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/61989326506.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/sogojebelinetesojezev.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/55820812289.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/wisuxamavekatevofowufela.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/57024053180.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/30107148872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=transferring+photos+from+android+phone+to+computerPDF 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_off0000d405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD405 17380 bytes
SHA-256: a836e07889b3050cca911a8a8b89021f4159145193518fd1fe3563ac1e1c5fc6
font_01_sfnt_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D9 11084 bytes
SHA-256: d1c161fd09f19269e3a4e71a80c37334a251fa7fc879365775c0f5347dbb1c7b

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