Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b46f650821e234…

MALICIOUS

PDF

87.9 KB Created: 2021-07-09 08:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b33e7fd6f88cbabd662c556578cf90c9 SHA-1: 1240d0cd0c2bf577d509d06bf46a99493b50deed SHA-256: 46b46f650821e234caed61fdb24d3f7fb61bf3a7d75140ed68d75a1bc0a0840b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The presence of these links suggests an attempt to direct users to malicious content, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cb21eb3cf---78327285827.pdf In PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051005344373499.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d9754d40a---zibol.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cae6eda---faxopebifi.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b42f325d6---5792556508.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/jefalub.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/fc7f375a49736c28709eaeb2409a243b/widiwav.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/wojapokagexotaxedunajavi.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/nugoduvinutuga.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824dfb6eb9d---36526919171.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5ccbb7de1---75294838798.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/givarujosifivalaxava.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/a49qe8sl009q7j5t3jl4abct82/nawepet.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963a5264067---69277177768.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2e8n05me5n7gmqlrkqqlc9ftc/99799746224.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160767ab4477f2---jowirawowusovipewolu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609efaf963910---kojuvokulotovudos.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7a9d34a11---samox.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/jofupejesomo.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/lixoxumaxoluretererotex.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/62604448443.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/64s7v5hd3h0i52vksq9rdqb254/58313982610.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e5d2b1bbbd590c8d935e9e4e19d06630/vodesazos.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/34462015737.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/edd939523e0d9ddff4e2478fbde8f3b7/gavibulusurekodun.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/lenuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=lala+song+download+mp3PDF 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_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 17304 bytes
SHA-256: e6c5312db659456bcc1e8fc42b1cfcb633c9bfa4d535d552fac3c3cb15784fac
font_01_sfnt_off0001226a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226A 10528 bytes
SHA-256: abff27d05efe365ac8e79de5248ed2c3229d72eacfd6c48eadbea5ce0eefff7a
font_02_sfnt_off00013a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1