Malicious PDF — malware analysis report

Static analysis result for SHA-256 3744522dd1549a37…

MALICIOUS

PDF

85.3 KB Created: 2021-07-08 03:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2bff9f9b2ce370b802c074dfb60ea30c SHA-1: 089ffecc2387f020c2e0208333ed2f7b09fd644e SHA-256: 3744522dd1549a37bdaafc4e910891f15f4328c02afc79304f6d8c08feacc1ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://igigeothermal.jp/userfiles/file/1059234673.pdf In PDF document text
    • https://robertbah.si/files/file/jatazod.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26a0cb28---30409061864.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/luvuvof.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fbddccd5ed98c9c8b0c512796440d6f1/43242566603.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/eb464974cda7030d00b5ce3bc72c86f0/madalinimukuxajodomuta.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/99d1f8176826d1bf25a6811288427b7c/gebimodipomuwabaxa.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/20256071103.pdfIn PDF document text
    • http://caramelitos.sk/files/85582800653.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/aa062b28d7b1eb05c34049178e2d7acb/602580920.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/28037223419.pdfIn PDF document text
    • http://allycatering.com/userfiles/77445977420.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/tvfnkrlum3dpeda2r82v5qvkul/23995571243.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1c018b9fa58689d9a87f0e884ebb887d/labusemopadezujaz.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/4890874052.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/aa6e2e9cb37cce141b21bcaf0916eb6b/mupipuvaxe.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/03a646e72ac730d8cee724b2b007eaa1/47393804743.pdfIn PDF document text
    • https://chptravel.ir/data/file/golagojojujopupufawojipux.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608408b4767a8---50754666838.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/dfu3ncvbl07jvtdco2rjpjnjud/29793755027.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/28006461225.pdfIn PDF document text
    • http://endemic-capital.ru/uploads/files/sogebupimebatatikamoxigin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=heaven+is+a+place+not+too+far+away+justin+bieberPDF 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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 16788 bytes
SHA-256: 66687f2e3aefd01f5b254fb6f65f3e5fb90710bd8a6003d292fc7255e515b26c
font_01_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 11100 bytes
SHA-256: 1fb72b72ad46797dd73676c12bf32abc52ec6d60c7d035557a41679f302cfa94
font_02_sfnt_off00012fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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