Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ecd0da1c60e483…

MALICIOUS

PDF

197.2 KB Created: 2021-06-30 02:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 9ecce4a8c5ff84e16558fe41db616828 SHA-1: cebb5324cdd31665786a485102a92bf59ca94ab9 SHA-256: 11ecd0da1c60e483f5bbf80ea943537d2e4e973e3995730101dda8ab59e024be
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript and multiple links to external URLs, many of which point to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded JavaScript and external links are likely used to download and execute a secondary payload, indicating a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4008

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f65bd871dc448df8598ed94234d5fa06/61433665609.pdf In PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/25323242895.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3c0kfdioq3tue83dag5nhif836/24810227407.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac6f06faf9---46472891151.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/6524564537.pdfIn PDF document text
    • http://ipublicity.cz/data/file/fugezuvebovubexi.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/18318892396.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c61e64d81a7---69657901829.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073856b3bea9---11615604168.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0b0b3cbb---fezalufo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/h5keco8p1d52eb2msrbktb23t7/55721254071.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/7472024915.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/75074633491.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/nudogelavutubejonatadijo.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fe4f4f69b---tilajarez.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/04luorc8d4o5n5gtj29oemmju7/dupewitevojuwoleneze.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/tofuximimozivarenavofok.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///zulasenup.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928f0f0c23e---fefideregemojum.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ias2tbpimnkm9eob9beteg1f5b/mozolufizusudoje.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/p8glfnbfgpktm6j70g228r49g7/79985611577.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefe786907---6709559529.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/38c3va72vkqrfdf6elbmmkcre7/tiverukutizubar.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608164f06a95f---45712378465.pdfPDF link annotation
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097271980090---70012919257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=fydeos+install+play+storePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC89 3212 bytes
SHA-256: 040976789efa89f5789552dca10296a0c2a3d5da933c1f8aeeefb970c65d402d
font_01_sfnt_off0002f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1