Malicious PDF — malware analysis report

Static analysis result for SHA-256 b572ebc2c341361d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-10 03:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e966251e55ecda9df00789671313fa18 SHA-1: 53ed393101bdc0adcba004a8b0e88e48bd466445 SHA-256: b572ebc2c341361da6cf91579bae5f7526af11429bee38ef7d450906467bb962
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://medvor.ru/uplcv?utm_term=dangal+tamil+movie+download+hd+1080p+free+download+tamilrockers PDF link annotation
    • http://meyergarden.com/ckfinder/userfiles/files/65804866288.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/70792986381.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/lilixunoduseruko.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/9be974b3182bb7142b61c9167bd79364/66299763022.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d68da459---keripuxufoborevivufi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/3k30tsncjs65urn12h7t6e6sd7/4344806567.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16134805ab2678---82769544151.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/36338159415.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/xodovadigomekojusogemid.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wizelexun.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/nizizuwejo.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/razipiwixujasefop.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109081801363927.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/58230971343.pdfIn PDF document text
    • http://vejwun.cz/images/tojukuwagamimoruxag.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5ed568d20b115938cdf2d4e02924d412/31842924508.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/sidalod.pdfIn PDF document text
    • https://techlan.pl/files/file/78795509035.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/4308196139.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/67253559973.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd010e9b6---34288173919.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1630801364/file/mupatigaxi.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/jisetibazimegowudileraf.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/79009520296.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_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 19824 bytes
SHA-256: a20facefdc31a4d9a48d64792c1d4fae1ecf1fa95768782387eb9b97bf4df2df
font_01_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB2 11692 bytes
SHA-256: 42e65db7310600a3856e26bf6c52910bc22d3d8ddb866d4cd34cf803a2c63ca6