Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc3073d0e4baa3d…

MALICIOUS

PDF

100.4 KB Created: 2021-07-27 14:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5a0120016415348140750453f30d1485 SHA-1: 7cbc59e8658cfb69c892b39ed26259edf80d9c17 SHA-256: 1dc3073d0e4baa3d62af0345baaf2837156480dfba092b041a3d3c00167422d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute phishing content or malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2ab92e25f80f9267e0352db028dd79a2/30518783926.pdf In PDF document text
    • http://chemicalengineers.ie/images/vakodaroz.pdfIn PDF document text
    • https://www.carrentchiengmai.com/files/xijemulipo.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b20e67a692d4a784c82fb39db6d631a2/giteruwaxadomotukajojifux.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e831e147b---gikuxiken.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/81648697918.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/67162780139.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160929454ab285---32119359313.pdfIn PDF document text
    • http://aven.su/userfiles/file/besaxi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ff9565891---87746874508.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/b259df0e913d1452b2b85d6cc556dc0b/pigurirutorugejopo.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/71235892888.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/xezovekosiv.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160801a805260d---3346330552.pdfIn PDF document text
    • http://learningkey.org/userfiles/laxerikovum.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/39731879629.pdfIn PDF document text
    • https://wrd13.com/force/file/58122308543.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/vujarazozi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3cbb477f26148b96fa683c22f3078b72/50312451131.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8c36ccc9---tamijosisizijopijofiv.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/gidotafobatujox.pdfIn PDF document text
    • http://siembra.me/uploads/files/mimepi.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/88611415801.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/d42b359c1d896bd971365035a79ca215/kasararor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=genetic+mutations+worksheet+answer+key+biologyPDF 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_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 17380 bytes
SHA-256: 1994ba37b97a987306f0a7972c0c9da6570993e6a732f6cad11e817a2de85420
font_01_sfnt_off0001509a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509A 11248 bytes
SHA-256: 10dc31424e8ce7b606d3e271ddd37f3e3b4e671821163b73cc40de313801d07f
font_02_sfnt_off00016af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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