Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce2baebac8d0c30…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 16:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8e0ccec1daf3d6724a9ba399a2f0f576 SHA-1: 4af2b87e1c999eb8cff00161bdf516203934e616 SHA-256: 7ce2baebac8d0c30cfaacf549f6e1207f3750dab3129bcddc5ba3c91c01fa20e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML_NYX_PDF_MALICIOUS score of 0.998 further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://rimsball.com/ckfinder/userfiles/files/21908560430.pdf In PDF document text
    • https://devcons.org/uploads/userfiles/files/giwiravak.pdfIn PDF document text
    • http://firegallery.ru/img/upload/98752514043.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/052ed87494c8cb6e365e7bd2250b2259/70252961259.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/35140862325.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/c13e634185c0885b4ab3a168d666fed1/37215352495.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/5t9qj5vm66k16eqdr5vtradlec/91090800434.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/fomuja.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2fa6e2ca2bfa904e81c69e57a5d76f4c/83323124780.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ef4c2d15f---52387009907.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/41995543162.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/dc9c081ae658ff8b2537877e8fa833ee/51047889190.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0056e1ed7---rividusupiniwif.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/lakubumalukave.pdfIn PDF document text
    • http://metallpress.ru/files/gologarum.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/tukabevoxukapijurojepum.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/43103914420.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e20d80a8ba7045fc992d34eacb66aeed/4435659325.pdfIn PDF document text
    • http://quranday.org/userfiles/file/68809386836.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/2509087496.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/luxudeboduvuverupozufari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mad+magazine+543+pdfPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/filisipijidutomeroxawija.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_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 17892 bytes
SHA-256: 7e889b1855d653e1e5c5a9b3011b910f8573167112a1cea462c01059970fe9af
font_01_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 10748 bytes
SHA-256: 08105c345cf7a2559bb2cc3ec62b99fd2bab99f1252e02791d156e741f46639e
font_02_sfnt_off0001213d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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