Malicious PDF — malware analysis report

Static analysis result for SHA-256 69402fa68cd86328…

MALICIOUS

PDF

76.6 KB Created: 2021-09-02 09:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50adcc091121a86fb09d4a4d6df92009 SHA-1: 55ba034d717a9480df1378e03c11b3d7b7f138f7 SHA-256: 69402fa68cd86328d7cab4d1aaf3cee25edab290d90cfdc8e3ffdffade555bdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous URLs, many hosted on CMS upload directories, suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://prairieroseclothiers.com/FCKeditor/file/378434969.pdf In PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856747abe47---nazatedigi.pdfIn PDF document text
    • http://balone.net/_upload/file///57993695624.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/900d8b6657977963a5cc35a3635f6251/fatalikogulomemuxelugura.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/52311396571.pdfIn PDF document text
    • https://esvigo.com/upload/files/17733890212.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/79f17a39f55fe6899b36e558068f8416/kelafateluniwez.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/53497826886.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/13085902929.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/19c9d3151799bdac7b5bfb771f82db6c/mogonodopa.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/fb771d20c73fcc5a23cffa60bd0845c0/matoduwelanivetuzadigavuz.pdfIn PDF document text
    • http://honda-vo.com/upload/file/18627774850.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/36787687181.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/85f8cca2ca6ffea8f6f6be31120a082b/33122697907.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/43896271929.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/75110573966.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/jaxobiregoxa.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/vajenebi.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/lasepujuma.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/59037697704.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/5c3glj3a3hfkb5umdaq1h7cfct/81774719927.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160efd2396ab14---62436050346.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610891cc3eb7a---78855827507.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/miliweza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=richard+wright+between+the+world+and+mePDF 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_off0000c802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC802 10920 bytes
SHA-256: dc696f6ce3be16a69d8d57d755163a562e4e3e83e43af54f230c08c3035d444a
font_01_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 16724 bytes
SHA-256: e4ea514a79d48d29adcf9f926a82dc76b329e3c10d1cfa4ee522e81159fa5889
font_02_sfnt_off00010bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1