Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb6d06b87825fe2…

MALICIOUS

PDF

72.0 KB Created: 2021-06-06 15:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dbce5bc2ed7f891af18f960802be329a SHA-1: 7ec43bc28f7c1a5266d494244615a90bae45b7f7 SHA-256: 1eb6d06b87825fe27ed286de1fdd160c9bbb630471b7acd04501beaea702ab10
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, including one to 'cructi.ru', disguised as a search result for free movie downloads, likely serving as a lure for users. The presence of multiple links to compromised CMS upload storage suggests a broad distribution or redirection strategy.

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://cructi.ru/uplcv?utm_term=barbie+movies+in+tamil+free+download+tamilrockers PDF link annotation
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4189a20403---98130812920.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/523626ac9190fe33bcf063cafbe7a633/ditidaseribe.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/lufenetuwoloveb.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cfb5f42a6338fd109b8c6e88d7d046b/wirux.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098787979fb7---zotufafovutasokexenap.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/86061910010.pdfIn PDF document text
    • http://93564497.com/userfiles/3270178622.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160821eb92c792---rovijunufobakodidider.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52c075b3e---jomezulibonejuwenazor.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16087943cc428a---58149297250.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/57770150113.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/mhmv7h6pepqldtseggdefnc69v/nesegekifap.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/80683075068.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f1349d54f---pemiwu.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/64842587659.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_off0000dc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5E 5572 bytes
SHA-256: 9fa2f45eedd469413e4c74cfd3356ecdc839621080e4e28b1b27ab850e8be287
font_01_sfnt_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 10440 bytes
SHA-256: 4771ae04f0aaac1179ca7a275e43cc594e1acc98bf6ad8961dc4fd0e12ae298a

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