Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c570d6b4e6ebe9…

MALICIOUS

PDF

83.3 KB Created: 2021-09-03 23:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8c353f3423a17bedeeed8fb0d7a1bb8d SHA-1: f8314db3e8f401f4f6b2e0ce981b1458a6a66d74 SHA-256: c0c570d6b4e6ebe9d2816088eaa2e5aad97f09a0107f252c95cb0103566dfdda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160960cf54cbdd---12569007610.pdf In PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607841d03b5d3---514931030.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/rowibun.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/32084457603.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/26648f157b8aa2381a74e88af70469ec/41494154127.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/jikorunofizubutubefij.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/23258455399.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/sitoxelujumozed.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ui3mc1a4qu85v2us3qlo2jsp7g/ranoravurapurisisiwa.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b836955cdb5---suzep.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160921d5d47219---15379833881.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1624590281.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/11166236453.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/biborolosukadobuximan.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/fugezupesu.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/pirapanele.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/zizowiwiburuv.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/202694498.pdfIn PDF document text
    • http://bio86.fr/fichiers/senomilefovobolijefipas.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/38179134054.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/4503226643.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/699c72f1f1122b0265f575cc7b143b54/14589033193.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160779314d1cae---28062452896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=elections+and+political+parties+in+the+philippines+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E3 18608 bytes
SHA-256: 827f6bbd8356e1f257296576b25487b8065e8c76449abe5c295c105c1c1f64fa
font_02_sfnt_off0001269f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269F 10700 bytes
SHA-256: f5b60d07920faa0565327d9f7bd1842be44e28f401e330db1943fcfd1fd3568c

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