Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6aa6f1639d833d…

MALICIOUS

PDF

86.0 KB Created: 2021-07-16 17:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 31b96b25a4c7054f46cf4636f100ae8b SHA-1: cf485749fa8f0c1ba42d5af62c62f0167100c16c SHA-256: fe6aa6f1639d833d589c5d0c550bdbbb52149f54bd60b2f07f1d5bd2390a138a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec61fe5b22---72843668392.pdf In PDF document text
    • http://abwmarlboropike.com/uploads/files/bajegipipud.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/545a83ca2bcefa7a5679db3e2a83da0f/26606098629.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210620114906.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2j160ln5bkjsko87fm7g5pj25/kuzivigitowipawovubi.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1da415469---61850712357.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/1e67cd9e462f205ff08123bf92379923/7470871545.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d40fe3b53e7---95278341308.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fb268955f---29648123997.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b0e4413c9---179324204.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/777819407.pdfIn PDF document text
    • http://paliukenas.lt/i/File/6552877427.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/87927299463.pdfIn PDF document text
    • http://axwelindia.com/uploads/narajasirefofe.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160babf39a9241---76674139534.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/ad26e31c66e18b8a8148881520f99d63/menor.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/15496327826.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/ledobisine.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/89053346181.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/87716123343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=grievance+after+leavingPDF 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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 16772 bytes
SHA-256: 9802f62c6de952431873fde8d9d41f26d76547d9bdd9a8101ea8e062b4bb8292
font_01_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 10328 bytes
SHA-256: 6e1ce372aee93e227213018521e11b1051030a8142c8b6bc6dd62c6fd08c8165

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