Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48002956891570b…

MALICIOUS

PDF

69.5 KB Created: 2021-09-27 00:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: af4793cc062bcfcd5ac3cc6817b0e30d SHA-1: d36bb8e6ba354dce628681d1c82ac80e331c5e9b SHA-256: c48002956891570b701dee93395a2a672187f275351c962e06ce40bedf90c741
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of a phishing campaign designed to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138198b36b78---gezuluku.pdf In PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/xedozamubelevalujuzune.pdfIn PDF document text
    • http://hidropro.hu/upload/67393472063.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/mimesevodos.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/jivamimub.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16140730140978---gasolelatitoxudajilife.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302f7ac30c4---wosasulewazabijisaja.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/25041981579.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/52405845410.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/toginuzuromat.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/livigexudenazifogaloki.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/jozovemubabatupasetude.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/fewafafigasilibewo.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/43153452710.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/jokexanu.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/kaxedexufa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fmac1jqp42drhcfus9m70gapu4/54394996160.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/jegibapa.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/31360359146.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/lisixupulerom.pdfIn PDF document text
    • https://albertscience.com/ckfinder/userfiles/files/21691831318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=warehouse+management+system+process+flow+diagramPDF 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_off0000ac7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7A 15592 bytes
SHA-256: 1da27e85e7700c6560aa67ba6ecb3c1f4d633df35598f4dd3d6d5bcb796e8727
font_01_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 11360 bytes
SHA-256: d476d78bf63747bcde28f4b3045da6636252837a3db74b0de19a7e3ed68bf143