Malicious PDF — malware analysis report

Static analysis result for SHA-256 480559e411e1eb74…

MALICIOUS

PDF

89.0 KB Created: 2021-07-23 17:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 201f004203204dba17beb8d6710ead9a SHA-1: f61ec7388c9eaa685d5a993bf1af4abef1dfa0d0 SHA-256: 480559e411e1eb7485b97e356019799dff183f6c45f4838f5e2a571a21d10cbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish for information. The document body is unreadable, but the heuristic firings strongly indicate a malicious intent to redirect users to external, potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

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 https://singlespeed-switzerland.ch/userfiles/files/zonomorikeva.pdf In PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/kowopivazezizab.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/27bff6376198527dcf4f1156958c267d/50855375032.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/50812043323.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/65903842696.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/jusifurinotaba.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/q9sp903d0f2bm3plvuo691c2hk/rixofu.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/40202774280.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/71446307525.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/84292773667.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36e3c725e---nufozikilutijo.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6b3c0cd76db4e8e1a9e9cd9b7e020cb0/nipowapej.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/fhvbqbgqe5fj349jltd39lljfl/daroposirejidenemiw.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a574a5af948---gidigares.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085748c3b8a6---matunokowobifaf.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7bc8c025c---11466045596.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78bg93nrglv4huro2ag07frvg1/17341072413.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/77030202593.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/xaluvomonapu.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16085c6e004ebf---25590500509.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/15573cd1f55efcba8775cc975c752c3e/69812592438.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/a9auah505ugvib9nrlkhtcqna8/faxazekamurifafegit.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/rokela.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/zilemozigegofi.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210530090920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=saga+de+tres+metros+sobre+el+cielo+librosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 10824 bytes
SHA-256: 2e9a4f07543b71aac945ce1a5d6bb65b3de9d3b6c5554e3bcd9d98addec52383
font_03_sfnt_off0001234b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234B 19408 bytes
SHA-256: 007b8b218b50646b4dcf3b9321d6420a0cce392e5ba712310c57576d448a85f2