Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6301b0fe388f1d…

MALICIOUS

PDF

116.2 KB Created: 2021-08-13 12:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 234ca8c568c72a6f1587975e1bddbd85 SHA-1: 7d862c2159e23435ccfb0ad86c5468d5bf0c2057 SHA-256: dc6301b0fe388f1d78e30b08a74347b38961a5680b9e31c78093d58d9d0e54fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://coretry.ru/uplcv?utm_term=%C4%87wiczenia+gramatyczne+matura+podstawowa+angielski+pdf PDF link annotation
    • http://solo-enoant.com/content/files/files/91787372456.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/pefuge.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609595807ecd0---penuk.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609045963ca35---91758063929.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210622142730_y9wutz.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b43ef74f38---lebopesagowufonolibakok.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/86680729828.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/levunavigigesavu.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/73384021529.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/5a53a555b56f13d8a95715c67864420a/resowewazebej.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/10544755042.pdfIn PDF document text
    • https://maturana.cl/upload/file/82579293245.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607272adc2031---vasidita.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/65122240052.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/n1bmh77va98gtkqvd93uekf4jo/26967151328.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/motibe.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4bc457cd1---rejakaronadatotow.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/duvefotusi.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/409abfde1f576c234d743a06225a1fce/sokegamewarakok.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/41c96efd5cca267fd2e209eeef446166/jifatelaxuz.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_off00015cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF9 11464 bytes
SHA-256: 7179970c24f71e07ecb9fd3fbe66ab738f6678a1d211d165e14f6e3bbdacbea3
font_01_sfnt_off0001780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1780E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19020 19344 bytes
SHA-256: 4597de73711ee6e82f57ca17bf5ec776e36a067b1b52968675ad1b5901cd7f67

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