Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef8814c1704f6a7…

MALICIOUS

PDF

62.3 KB Created: 2021-09-27 06:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7011c05b78c2e4ad307003add063973d SHA-1: d21ddaa3c31ce1b6ec650ac28898c36c8f9390a6 SHA-256: 2ef8814c1704f6a74f96d12e57ffb608c4ca16fd237311f68ff8448495c4349d
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories. ClamAV identified the file as 'Pdf.Phishing.Trojan', indicating a malicious intent to phish users. The presence of multiple links on potentially compromised sites suggests an attempt to distribute malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2821

Heuristics 5

  • 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
  • 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://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/rhqt1dmkqs8qf31bd9golajin0/guvotuvodoresamutugaw.pdf In PDF document text
    • https://ph2020.org/FCKeditor/file/8744644373.pdfIn PDF document text
    • http://rydelko.eu/userfiles/file/56780599322.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/48347755483.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/gumiwo.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/zufudatikonugemiwalu.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3e23bd2701b28b4eb529169eacf17eea/15705986019.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/xafesimewitujuke.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/33290481172.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146e3ea66cc3---80847025914.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/bavowemawudujetijesesi.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/71098947217.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/30221214990.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/fasonugosakesalufemozupaf.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/81442859067.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/56024343969.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/17504537476.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613990f85e86f---ragekajidetusifeka.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/22514121485.pdfIn PDF document text
    • http://teifsepahan.com/files/file/25845262209.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/3918066208.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/57365140149.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/79278361421.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/xunusipuxifijovot.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a53f20718---22640805066.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/70081638447.pdfIn PDF document text
    • http://fitviewer.com/files/file/35537545532.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/76888112328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=purple+hatsune+mikuPDF 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_off0000c290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC290 10592 bytes
SHA-256: 0f72691274de80ce545846e4dc65ab2f2e8ec214a51d7384b856af392b98598e
font_01_sfnt_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1