Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae65a2f2a749aa7…

MALICIOUS

PDF

82.9 KB Created: 2021-07-17 00:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 59e449ab82ec2be47af3e03d9d0b19ab SHA-1: 26698148b6d828e8d36fd894825d877950527e0a SHA-256: 2ae65a2f2a749aa7c5e47292ac64a9f37f5f4e5367118fc13eb261e120939407
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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.
  • 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
  • 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://www.hangmandigital.com/files/file/29361777460.pdf In PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/35672731105.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/60e9319ac51bdfec2ca6e7dcced382fe/90962039098.pdfIn PDF document text
    • http://digifast.cz/userfiles/libanaxotomonifaxuzefu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/bucsjoc4dqkl5j85s8nvsrltu7/51970250216.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/57424946149.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a997a9a2355---gigotorofikolina.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34297b292d---xitusixawewolike.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/mutelokovezemus.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/561112960609c8db3407b4.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/35640854091.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/sonepolenatamejikegegafes.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/juwesulipitavab.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/067a31a3289462bf74fb0733f93f7d37/88025900266.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d75595e93---11740084057.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160906c92533c2---81820916839.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1ba0c4093---86215645707.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/57217715809.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/wuvifijomo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b772f154584---godogagamen.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b445oq6q5guuar4d73lsrjn8e3/90352753737.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/bewikujaletofiguw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=spinal+anesthesia+painfulPDF 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_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 10412 bytes
SHA-256: 8e11ea9e891957ae9113252c9d6c938e9704f8f045f8f9c268d947db272a297d
font_01_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 15948 bytes
SHA-256: 4b73c3d555524a80ea47c51f2240b8c38f0d7a1553292d0aaec791f60d97a1dc
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1