Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed3a7e8373f4bd8…

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 17:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dba573cf18fd436690424c73f5df5e50 SHA-1: 4301347cc2dbd88cd46331e0c02653a231dfce59 SHA-256: eed3a7e8373f4bd85137b0d5f05a4a663fae73c3c384f48873a1449285e63718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. The presence of numerous external URIs and the nature of the detected heuristics indicate an attempt to redirect the user to malicious content.

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 http://apcmagon.com/userfiles/91987735664.pdf In PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/55n1gev99eed1mmnbhfuo6g78c/toponoxilipuxijaxajugino.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/54014208757.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e6e0322fa---90325249935.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210709_A651AFFC581550BE.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/bba81beab02ab9e3f0a7ac91dc29bb18/lefilekilopulage.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/zokosenaxazimapu.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/9242f5b9cae7d8dbdecf875bab6e1c24/17970492515.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/faxewibogapasexepuzezewam.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ecb39fa0---bexese.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/bixitobavamag.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/2844ca5f6c17d044c6db2f739b80425a/96635978067.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/45281186300.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/89263935669.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5ef8cf789---33476741999.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/lexomonabazabedoxewez.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd62628165---79000077832.pdfIn PDF document text
    • https://cakkue.com/contents//files/47810321524.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/kubol.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/89923258882.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079754754684---wolagokotovanada.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609238103da40---mitoriwixopot.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/n72snt4n6l6cau4pljs1uuqs4t/lalokexizakuweki.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d51901407c3---fifujola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=powerpoint+insert+pdf+as+iconPDF 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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 10656 bytes
SHA-256: 70e1611a7a1a540d0618e81be0d809adee39e03ee0b94707b8469525c578a125
font_01_sfnt_off0000fceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 18164 bytes
SHA-256: a9fcd2dc2d58ac73bed4f10b8c649eab3de37c529f5ae3eb869c6ba9b3400969

Open this report in the interactive analyzer, or submit your own file for analysis.