Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa26724b9faa543…

MALICIOUS

PDF

69.5 KB Created: 2021-09-17 15:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea4b6ac2a601da9423c16ff618e4fc69 SHA-1: 9e6e2b371112c6839bc8da36774c803950462c2a SHA-256: 7aa26724b9faa5434ea23dc491d1c9585063020c205ef792706a17201f254eef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lure users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8213

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=outgoing+settings+for+gmail+on+android PDF link annotation
    • http://ficfart.org/userfiles/file/ruferibopomiget.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/dakukunexofemegolo.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a778e1f1ca---12379065050.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/72284107734.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/98994206778.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/xujiluk.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021915201914.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a3c433fb1---menuzasanexowabunusunove.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021921045102836.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/5527193309.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/pifegigifopinege.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/35938391343.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/24563467182.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/8742454752.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/24617359980.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926364c4be---dudojej.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210906204721.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/latanisulodozetetomakem.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/31467778181.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/11123039563.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/5v8iq2q9p6a6jpv2dmmbau3jdu/80882405704.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/wakiwig.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/labuvukurus.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 10820 bytes
SHA-256: 101ef0dab691f46f753cce687bb17d6af3e26cde9637c656edbe919a7a35b6e7
font_01_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 16952 bytes
SHA-256: 40a20c180374e3c4da823d7cdcfa3e1d540224cb64aeaa7fb905748bf9ce6206

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