Malicious PDF — malware analysis report

Static analysis result for SHA-256 009397a61950f2c9…

MALICIOUS

PDF

89.1 KB Created: 2021-07-13 22:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fbedc6fe017f2d4f115cd78fe6f29c68 SHA-1: 8a50ffefe34b2693bf748458e288c7e0e757c4b9 SHA-256: 009397a61950f2c96dea1a0d47baae123ba92af0503d03aa52c9dafbfe6d6297
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/eac7t09nm23vf12r3s23vvjuc1/tojinenejulugowuronoli.pdf In PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c54f120f87d---46361521229.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/hn3n1buo10eojt0gg8u6l0r43g/momuxizoveser.pdfIn PDF document text
    • http://susanirvine.com/clients/82887/File/91493412963.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/luxomomurawekabosuz.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/72f9637d9006ff0b99c9cc51ff4ea7b9/93022041137.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c139716e02b---sopuwibokipawatexux.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4d2e5c00292ec81bc53c0336e2e7d1c7/71713798947.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/55310398896.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b7da3240a---33620898088.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a079eb1db82---wemaxoja.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2dae15042---1446163465.pdfIn PDF document text
    • https://goodline.by/userfiles/file/boroxujigixotolopabamazu.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f10efe4a82---kotuxalajopeg.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac723285577---42063312198.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/36e773f0627f9c4bf81d5201e1f6024c/57237752465.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/88327996594.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/e45b5e5f18177f1c1df0aa44d9d26a82/44369888183.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/48082937722.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b261d38fea---povomadikulimo.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/73385997324.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a7c20f2d---pigazinileludupugijuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=there+is+new+every+morning+versePDF 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_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001117a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117A 10476 bytes
SHA-256: 4e61e06fd5ed7141cc10c75d195f5f2e474ebd2e03236d8ff96539ef0a8c20de
font_02_sfnt_off00012928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12928 17716 bytes
SHA-256: 5d597186026701820402855b205a67776982e010d3728329a59df4bc59e149f7

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