Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccc804810a2c67d…

MALICIOUS

PDF

89.8 KB Created: 2021-06-15 19:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c8c67399b5fc7363ad042e189ebe4e0a SHA-1: dc69519fc96944c20c6b7c4fba70c7cd14753629 SHA-256: bccc804810a2c67dd160fe5c994a374c6457548c307961e544038600a14aed14
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a 'support guide' lure, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=leona+support+guide PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/58f9940b478fd45aec79c42a988970f5/tovowevo.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vifenag.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/xizifobalikuwuvofutojijox.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6aac4c2b4---65949551030.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/98496972906.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/91513650392.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/3549130479.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/8396c756045647bd420db3d475e20f29/36992298192.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609899b218c30---leratonufopugifomozejeru.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/ac294062b310a641f1be08394a07d324/65715297793.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/pejipisaz.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/losiru.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/s0u8uu8oihcj1mhim4ot623td1/vubawigej.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0dd745d4063156c0614b55378d7f6b45/90404371594.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lhi5v40p9emvjicohq358tt0aj/jabajumanawogejotaduxusom.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d056053c4e---78943478381.pdfIn PDF document text
    • https://paperland.bg/uploads/file/27369987348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 5036 bytes
SHA-256: 37473393427111501bd16d45deed2b141ef6932235bf37ed3f2567dbff0e888a
font_01_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 13012 bytes
SHA-256: 61ccbbe18427f8619bed3e98e2ecf03b2068dd161de54b4d104e6ee8b7a85b20