Malicious PDF — malware analysis report

Static analysis result for SHA-256 6488b97a232bbefa…

MALICIOUS

PDF

81.9 KB Created: 2021-09-01 03:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a0dd7253c974d8aae72c1542255ca741 SHA-1: 02379194dc1b01fdd89984f9468e4d2b2abb3b75 SHA-256: 6488b97a232bbefaa1a70d1bb266e07b90b2a05d7b5e0b965fd48deaa82b105e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. It contains numerous links to external websites, many hosted on compromised WordPress instances, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://ketchas.ru/uplcv?utm_term=difference+between+i+was+and+i+were PDF link annotation
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/d244253c01cabfe831c222b6eb4d4cbf/tetevidogutajiw.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/sugesotimibubaxesaginixo.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/85503628552.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612dc43381e12---14009597393.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082547280f46---nomiwufepu.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b63729995---zerebofapel.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/54842170145.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18dbad9b7d---22875319515.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a50d21e6d---22481451503.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/pugigefizat.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/57140486579.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/pidofovetidajaxo.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a55adaa62---21786032073.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/44599007458.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/94967056125.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6609d909e179c59ec52f08bdcce672d2/nokoda.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/ef70175a141c9e412392616a8ab8230a/32191517797.pdfIn PDF document text
    • http://fotossc.pl/_files/file/29207792478.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/womitarevokaninipef.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607caefa95ba7---41523983535.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6c2ce629ff0dce1c43ffb0e48c832b1/10927366201.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/tuqb6gk419bf7veru2nn9oes1l/54074209003.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/sogekejolunivebenelawij.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/bapipevuxululanulozezone.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_off0000da6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 18428 bytes
SHA-256: be65e042930d6a248acaab0d952924e11cf3f67b8613b076e83b43f62a8bf33b
font_01_sfnt_off000109c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 10528 bytes
SHA-256: 9a1a42a5cf2eda8bcde02a0de7097cfd156ca19a8f54abc9b6a0f477b83a1833
font_02_sfnt_off00012203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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