Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ffeb0a6fee9ecf…

MALICIOUS

PDF

94.5 KB Created: 2021-06-30 04:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 758fd370fe865bc5190187473e08c0e4 SHA-1: a327339c21abf19faefd08a807b10da2d41b38db SHA-256: 09ffeb0a6fee9ecf94147c76ec803f3376355e9d0513f6e4f220904187e34d71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. One URL, https://crewmak.ru/uplcv?utm_term=easy+savory+appetizers, is directly embedded, indicating a potential lure or command and control endpoint.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://crewmak.ru/uplcv?utm_term=easy+savory+appetizers PDF link annotation
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086274ebb7de---48053875525.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/69a777eae35dd76fd7d84ad0275bd7ea/sanuranevoratozezufise.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b6ffc7db01985d7db4f4c4493adcec40/896168005.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a44dc4ac4---gilozopin.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ec6817e53dbc64cad8e4a480f9143462/winevuvodona.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160750d64bd10a---zugadop.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ee5f41b7e---56263180921.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087523894d0b---25905830703.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/jpbtv6maahslvu5kcp1p2kmco7/nazivapelapuzag.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/23880041618.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/nunet.pdfIn PDF document text
    • http://dgjst.com/upfile/file/9130050300.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/vedamubufuseputig.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075be2bf0ffd---67288932068.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6108e8a60---mewewiragewiresitexigadem.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/54482372675.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dd70af14064f35da0f349fa020dbb8e/mukumanum.pdfIn PDF document text
    • https://factinet.com/uploads/files/42129034613.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5c2c6dbff4c8fed3984cb06af71b1961/mapozimatejijupikob.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/bigapikimovazogivuraxu.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/26393164216.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cea03e8f7e3edd0af18fcecdab6699d5/24744725483.pdfIn PDF document text
    • https://dietacud.eu/upload/file/18574290645.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/67640206154.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/9460789279.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7ab4cd6cf83c63f67dc8ff03d92f213a/lirir.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_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001278d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278D 10320 bytes
SHA-256: b3c376729c7b9249d53c68970d3dc8c06b84d1f3c87d3681d952f9c9240d7212
font_02_sfnt_off00013f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F06 18104 bytes
SHA-256: c5c1df16c7e63f6606f76cc37e16a1c4b7302149f7a433e6953db7b337d205d3

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