Malicious PDF — malware analysis report

Static analysis result for SHA-256 16af9c62a74d30d3…

MALICIOUS

PDF

74.8 KB Created: 2021-07-08 17:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6889d5be7dd841bb7c823c41a192c953 SHA-1: 9573b15338005cb58367329930ff01cab028f482 SHA-256: 16af9c62a74d30d32fd23a60c4784391e3de4885e684c4e2f1be0041343a8b91
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests the document's primary purpose is to lure victims to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/35ff3836e5477f3552f996be520159dc/zakutopumajasojananowowaz.pdf In PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/489e34379262c60b0b159909b9d070ec/magabitemavuwusege.pdfIn PDF document text
    • http://rhondachem.com/d/files/rawuzu.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/sovuwusetezebulolon.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742bed49012---begubesuxugopozenupena.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ac4ac43192fadfef2d12319d6e789609/35431280385.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/38795045210.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/8e6232cb8f51b1e79a5de688643d0212/34708331469.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98b035c98---weverutur.pdfIn PDF document text
    • https://magerp.org/upload/files/fizogotaraled.pdfIn PDF document text
    • https://oversaslogistica.it/file/dodawetowedizoxadisomozen.pdfIn PDF document text
    • http://dentherapia.hu/files/file/tekukigozode.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/40ee0e0586b55b067f1ee76910481953/daxitesabezimema.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/28578465602.pdfIn PDF document text
    • https://spacio.hk/attachment/file/1206603901.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/02de939ac0c28405665bb5d64aff3fe0/vedowubagana.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/98330574619.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/tctms1e7opmtkvta8b3ph8enn4/63320381298.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34f54a4f2---46837154242.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91154e2c0---16182769249.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/fnej3f1ao2t79mac4f69c7fctr/vagupenisebapo.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/dutowikaretupi.pdfIn PDF document text
    • http://dienmaybaongoc.com/ckfinder/userfiles/files/xilevavanerofefakawife.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eb75546d8---92592598181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=read+crime+and+punishment+online+freePDF 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_off0000c3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CB 11028 bytes
SHA-256: 899c2094099c9f354de490a7aba2a7c107d0f07b4f87a2f676335c103c9e5a63
font_01_sfnt_off0000dd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 15876 bytes
SHA-256: 8b99ad01830a8f7e5dc0852806fc1784cd56b87c9a5716561839fbb70f8bca7b
font_02_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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