Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfa78ec41268c7d…

MALICIOUS

PDF

73.0 KB Created: 2021-09-03 21:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 40007be9ccecbe134cee00dde61f2a2c SHA-1: 665028f3f23f33e77fb36c0b606600b8f8e90224 SHA-256: ebfa78ec41268c7d976863491b2c1c5bf7cc7c60d5c1e3e506812e9042ae0478
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to host or redirect to malicious content. The presence of embedded JavaScript further indicates potential for malicious activity, such as exploiting vulnerabilities or downloading secondary payloads. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 6

  • 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://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a784243e114---18212193639.pdf In PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/wopururejeritudepig.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf6393d38---pinepapoxijufimefetoro.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0983cab58ebfe6f3ac890623cd16dea1/burimuwawekeg.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/78654894513.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/46340601200.pdfIn PDF document text
    • http://dzbnf.com/upload/file///68684480392.pdfIn PDF document text
    • https://kawanmto.com/contents/files/piwukibivofezo.pdfIn PDF document text
    • http://terminsk.by/pics/files/piwobusi.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/3ju4otjfsu15m4gtk8lnnar0u7/42124891200.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/38ac79fb995f12ae5be7d6c5d4f54059/13607863336.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7c667ba187c7dd4d59b69c27ff18f3f1/97658651785.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/tezubanotafu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bgc10dmmacd988jm34dpt8m2k0/59382425840.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/zevifod.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/12231762332.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/rovotapadeg.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e259bcb80---4936734480.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ed70547ba2cd78f9e5f77e873938884e/91772325174.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/wupakobujameludukuroj.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075330fdda02---90618628102.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/77877615313.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ea65d5e79db4ed38bf4ae7f5c043867d/giverudasijoge.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/jopivimenexasowevinigareg.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/31682052222.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/kosiwomosarofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=resource+allocation+in+nigeria+pdfPDF 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_off0000ba70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA70 10940 bytes
SHA-256: d33ed44c2b5f90d5e6e2660ef415142c2b7188f4eb6520689792f754e97cb23f
font_01_sfnt_off0000d3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 17100 bytes
SHA-256: 542de68d4cb454a3a7b8f23bb2165524ffa684c6275be21396f6604c53358d2f

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