Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62a1240b4670856…

MALICIOUS

PDF

84.9 KB Created: 2021-06-30 05:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e7c5f24035b043100176677c2ace205a SHA-1: 2fb6672fada2ea9438d8ad69d46426b8299836e7 SHA-256: e62a1240b4670856137b9318ae597f19faa9204d62032295dc837909c5e7f3eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to compromised WordPress upload directories and other disposable hosting sites. The embedded URLs likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://coretry.ru/uplcv?utm_term=is+yet+a+conjunction PDF link annotation
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4q912u24fm8o63n1ggomudigmu/jonuxilozutuli.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/gezusapawuxa.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5573e6b07235a34f6c68ee0b9f5d09eb/44091585132.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/sodatebifosavakafesotifin.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/12496600464.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a5af3ce19---pipabive.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606efd2d266c8---88220233983.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/dnh2q02n7q7ninte6odadc7if6/kovenisewoxexufufowesu.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/4373095067cead34a700a760cc3f5377/76553287987.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947701dce7e---3129575052.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed4d4591a8---xekixuvawe.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160723a14bc234---dudef.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/xumonaxirilusarutafas.pdfIn PDF document text
    • http://accronline.com/userfiles/file/rafovis.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5b99a98fc---29104064235.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8b12d33126d327ba1e5f1cd8f95b7547/69461433865.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/10709414208.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/naduguzonobexizeraxa.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/56440416861.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/v5sdmphsbhhramstggghkulk2h/ritazerijotixanu.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bddb6c6c10a3cb9c259bf22c8e24a7ef/72045381153.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/velelomekawobe.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/zuzimidulivipiwewawufez.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210606041758.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/20302221831.pdfIn PDF document text
    • http://texmet.pl/userimages/file/pijejikenomo.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_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 10372 bytes
SHA-256: 86f0b9ddf28945ed4bf3263b1b696817134d02339844583c4af36c9c104b77f9
font_01_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 16736 bytes
SHA-256: 2d1ddb3a900e127fbec04e88a38088075cc2859d37b7c43e59e110dc29d0e5e1
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1