Malicious PDF — malware analysis report

Static analysis result for SHA-256 19297087ac71bb4d…

MALICIOUS

PDF

89.1 KB Created: 2021-07-03 03:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 70423aef7ce04068f426c959f75cb664 SHA-1: f69533ada01b049cc69286638ca58b64eefe6781 SHA-256: 19297087ac71bb4d7ad6b8df1ebeb3c495812cda9b5af47601993da928aeab5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://humanitool.ru/userfiles/file/62501355210.pdf In PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e675994c65984dce14d062fc17ff94b0/pawuze.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a989f0176f1---gepuxusafewajos.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/01a26faae0d1655a7e5e704041e38387/vopelineripafadijeg.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd4822003e---zivetipab.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf963347ca---selivar.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/44059222003.pdfIn PDF document text
    • http://davis-wilford.com/clients/5/5d/5d1655677b271656441dfc21bb295863/File/sawodudibobifaniliv.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4f571a09---57604953532.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/nafezesoxolenawetirivuf.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/q7sqbqu4u87e0g0t2thnch856s/bumusexovibesafurobesuwo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965339a50d2---nafiremopalewok.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/madedimavudut.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/0lom9kbj8tlr73dkrj6qmah9f3/momazigi.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160db6fa104886---zufuledafozixusux.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cff989a8801---92659320169.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/1224560950.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079322b0a64a---87777910636.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/c1gfkvpmpeobauskebsatl41a7/jerotirijuziwid.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/1f6c7ea2eb22514a4e06cec4d6cf95b0/97452602117.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/gerewafomixe.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa0ae6d8d---senesujil.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4ge4v4uj6vct8jbbckvqvpan8p/67996125059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=virtual+icebreakers+to+get+to+know+each+otherPDF 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_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 10896 bytes
SHA-256: 97dd44d2022f87c6cdff237abf550dacd08c5270c5149ba38f985bf64e221d77
font_01_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 16856 bytes
SHA-256: 71a310821e77ea39c2054b23409441707464038fcf0bc92941697cde3230ef2d
font_02_sfnt_off00013ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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