Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eedb8553a5095f3…

MALICIOUS

PDF

79.2 KB Created: 2021-07-21 16:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff3846fd053edb11adf705b9c13075b2 SHA-1: 5c104515dda0aa402ef3e59d4546c943a71ccc12 SHA-256: 5eedb8553a5095f360a1903633b9e2d16680e67f9f720ff8f8d4709bc4c0bc3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to disguise malicious activity as a legitimate document, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://evergladesharvesting.com/ckfinder/userfiles/files/41766901873.pdf In PDF document text
    • http://gleneaglehoa.org/images/file/8126553718.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/kilapinogivipiwovupok.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/tapiva.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e9e60f92edff2aa2f254de8538a43950/86276231451.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/xoworowutavujipiv.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/42718295536.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c864181e80---kogij.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/52996191234.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaac70f780---netalufaliribojasitunade.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/90ee1bb0145c3051a5f7a3d6483ca3d5/48929688972.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/11833989729.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0e33ecb2cd1009ef86c9140a5bf2ae7a/34300518948.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/53474a89b68fc845495c5f3ddf48b837/vufarewagalekobuzu.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/2d1acdd14149bd6a52840f33049a788f/pebepogulur.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a076103ed---lenorebovutiremekez.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/jewovaxajulebabimemap.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/3e6738d94fc96054e340369e071794fd/76655147169.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a58623c1---ziwesitedotupa.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/13775954611.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/22m7up3jj8g7tfef077i5o23gk/gamipap.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abd81515d43---10720585963.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f216762ce1---93089403042.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607291e1c1615---welunesebemipuzuxat.pdfIn PDF document text
    • https://mojer.bg/files/mawiwodet.pdfIn PDF document text
    • http://dzbnf.com/upload/file///kalefujunadefazivuwixol.pdfIn PDF document text
    • https://spacio.hk/attachment/file/72382389713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=old+age+pension+application+form+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_off0000d434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD434 10988 bytes
SHA-256: 5fbe9aa853f613efb0433f8b3acdd1ba21a8594c8530105b005fd6d9c4385348
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16048 bytes
SHA-256: feffb1062a102d46e3ccdc83f72725c00ec146f442fbafbd09aa5fd60a5d4af5

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