Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dde6b65754b5336…

MALICIOUS

PDF

83.5 KB Created: 2021-08-20 08:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 54302d38ba90873cdfef6869e5add0d2 SHA-1: c56f8fc1d2a99f64b49f0daf0cb4ac9dc7c6d597 SHA-256: 8dde6b65754b533653e7eb72dcfa867db673a0064535e3894e36e3ab0e70f33e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains. The embedded URLs, such as https://crewmak.ru/uplcv?utm_term=blue+jeans+no+sonr%C3%ADas+que+me+enamoro+pdf, are likely used for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crewmak.ru/uplcv?utm_term=blue+jeans+no+sonr%C3%ADas+que+me+enamoro+pdf PDF link annotation
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec61f2e096---89747706418.pdfIn PDF document text
    • http://apsons.eu/files/file/82237557912.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/40345017945.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7d644d57c504099ca1e94f0c2b9c08ce/80721222563.pdfIn PDF document text
    • http://modern-pro.ru/files/file/66396658324.pdfIn PDF document text
    • https://red-adlay.com/upload/files/wadojegegafuf.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/397c5bccc7494f8a380710369111d299/tiwatazesufulojok.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2a52bb50---70851756308.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb18a21bb---40990200869.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/gunawulawudas.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/lalax.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607723f1a7b37---malaridavibetemoriba.pdfIn PDF document text
    • http://gabortech.com/admin/file/gomigemuwovu.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5f5b1428834441a8197b7d640534cd6c/50029632956.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/sejoxefamefo.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/55855477049.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2d3fd1a9a---molomunojuteb.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc003a5c2---kozimixamofoja.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/rasetakojubifugi.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090109708dd9---fesowetexafudalus.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/nofibovij.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/ffb172ildri7qopeqpbrdpusb0/ginemisotijakasebusizatil.pdfIn PDF document text
    • https://orrizon.ru/images/file/39183629188.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/54098998234.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210601_181328_4633.pdfIn PDF document text
    • 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_off0000ddec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEC 10960 bytes
SHA-256: 30c7e02c6aef31a822d8b6c832c69a968615822d8541bd0690c38909e70debcc
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 18144 bytes
SHA-256: 2007405a50faf987bc2e2e0cedb27fde430b9cf16f35957f195ede5eb64af320

Open this report in the interactive analyzer, or submit your own file for analysis.