Malicious PDF — malware analysis report

Static analysis result for SHA-256 3000d03caf3bb071…

MALICIOUS

PDF

94.9 KB Created: 2021-06-27 23:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9bd8ce7aad0c66a1edec1125df437de8 SHA-1: 7a27956167d7ac467b57e0af20eea45ced0c8777 SHA-256: 3000d03caf3bb07198a88a210fa19291a40e5f12eb812001c3f1f8b2cf95d86f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to obscure the final malicious destination. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a phishing or redirection scheme. The ML classifier and ClamAV detection further confirm the malicious nature of the document, likely serving as a lure to a phishing page or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c2f4ca074---18729299955.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfd12ee0df---4236849753.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b745a7ba60c---86096600074.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/98877554279.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6d8396b2---26162399363.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wajefo.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/83302080156.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915e5c3f3c0---6389974830.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/430fb7d402ac77960a2749f4ba243061/12645480964.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b3afbdd23d9---66715963691.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/xeporitewaj.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/gobiniweg.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/sifokigoxejonatalen.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daa21e88f4---23432584748.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/56548014173.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1ab896e74---81784441877.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/9614746637.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/41228773132.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/nmfpiokkrh330sivfif4t6g3j5/zeduzudonada.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/wipalemerojevipupiv.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/50482239863.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/39b7a18ba9290a6f3c1f5165a94c86b1/75739253871.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f1443c7a8cb1f8b110a8f3fee714ff4e/70467327467.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fd4ca0f62aff7ac9884b6abc830210de/zepaler.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=foreshadowing+in+the+hate+u+givePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off00010f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 10708 bytes
SHA-256: 28ea0f98a04426f04c8eb3c5eda10fb1821299779fdfccc5f46c9e32fae02123
font_02_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 17028 bytes
SHA-256: c7fe347f21cf13151b980996ab517cdd5b1b647fed0dc3ae52571504bdb0769e
font_03_sfnt_off000153f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1