Malicious PDF — malware analysis report

Static analysis result for SHA-256 1029414766d8b199…

MALICIOUS

PDF

82.9 KB Created: 2021-08-15 00:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba1fe565bc3ccf01521d1ed05c00f801 SHA-1: 9e0a35f99c627e60d9085c6e506a3ed3f2009fca SHA-256: 1029414766d8b199512fda8fb9420336ba9698bc9137437d0327315e26ef4e4a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to distribute malicious content. The presence of numerous PDF links on potentially compromised infrastructure indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/21118069852.pdf In PDF document text
    • http://www.bluewhaleline.com/image/upload/File/warajawobunijigezelejavo.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/nedunexawajizorobuwizuza.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/jumabapinifodovetav.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8ed628a06c7d84a2d4485a8b7423d49/rosebodil.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64fc53d701---84017390737.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/8809273416.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcbf28a619---52858512459.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/25905725711.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/n6r3710urgilh5nnoi4vk02sqs/31443640240.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16078081ed4df7---kiteferejixitodurinudek.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cae15cdc---riwiwofam.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/9720464944.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xosopusijopaponigeka.pdfIn PDF document text
    • http://cjatkinson.com/userimages/lumixenusarogowanil.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78019447124.pdfIn PDF document text
    • http://veitali.com/upload/files/14682380691.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/8826109437.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2ed6fae1e0132080d4d67ea8be874bf5/76349225312.pdfIn PDF document text
    • http://webursitet.org/Files/file/68595760917.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/bacfe9b954d894940e3db2cf5753e05c/korevamitubowuga.pdfIn PDF document text
    • https://toocapen.com/files/11031944682.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/gonasuvoweruzepatinig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=super+mario+64+ds+gu%C3%ADa+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b89fe3074e5fdef710273c973d08402c/wuwavatubipamulomalibiman.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_off0000de6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 17316 bytes
SHA-256: 34c3e37f263ab5766d7f9066e50dae0af86a4bbe19cba6115347ba1cdd8cca19
font_01_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 11076 bytes
SHA-256: c5843f4f5ad64b56596e03834143f6e4d28add2cce4af40a3c39d40d798491ea
font_02_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1