Malicious PDF — malware analysis report

Static analysis result for SHA-256 78720ee614546147…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 07:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4f9e4eae9bc4d03b0add7df9dc052dca SHA-1: 4bbc7d8396ad679ad631cd5d1b568a969e92db3a SHA-256: 78720ee614546147a5566205aeeaf784bfd02e0a566e95b329ad15211338adf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs pointing to compromised websites and link farms, likely intended to redirect users to malicious content or phishing pages. The presence of these external links and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://catamma.ru/uplcv?utm_term=preparatory+school+and+college PDF link annotation
    • http://hanabi-la.com/uploads/files/kesixokomeziri.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uc9lb42h2os984fahdo6n783u5/tovinuvumedukulus.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b01a9dac407628bf52fa97ea3987911c/dedodijik.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/fegaxiliz.pdfIn PDF document text
    • https://limsurdua.com/contents//files/85531939609.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/sedotoditilejodusojobop.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120fdba65e0c---4674425973.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bdcc0105c---nifuvuso.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/50953753500.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/161182154d2aa1---22242334335.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f427d8d31e---37551995583.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/96276095199.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/40147986024.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/zajodov.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160813a51a470d---20999818917.pdfIn PDF document text
    • http://metallpress.ru/files/39089213302.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/apvmr1ogd87ajee3115c0hnunk/fufanomegux.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100d427b6e5d---62087327536.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/98434737696.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/32524714805.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa86aa54106---dozeb.pdfIn PDF document text
    • 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_off0000d7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 18652 bytes
SHA-256: fce543beffa6096a751a0ce03dc6dcbb12ff8001a866a605b0d3008351efc157
font_01_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 10816 bytes
SHA-256: 56a7fbc45a8cc048668e38813ba6539dc18432ec95ba06e6afa6cd6faecffb70
font_02_sfnt_off000121b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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