Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c968cf6fbd5d022…

MALICIOUS

PDF

72.7 KB Created: 2021-09-20 23:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3fafc0e40ef9eda69563fde5516bbeb SHA-1: 01a68e4790ddd078c536c21a4e5cf6f3e1a5ec47 SHA-256: 9c968cf6fbd5d0224a709bb1a2b49817f946870097e32b974c10733ed652699e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of 'utm_term' parameters suggests an attempt to track user engagement with potentially malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=creamy+chicken+and+prawn+recipes PDF link annotation
    • http://briquettemachinery.com/d/files/78003684907.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bff8b8170d---zugulovozazikeku.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/mefoludizefutajuzep.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/mekibudeloxal.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/fawufepogezufobisudusapod.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/94334322333.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/xuvopib.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/76896430877.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/36118317602.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/37261564946.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/pulazakodowaw.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/defibazunaxolagesutejafa.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/vikuwifedefedajubisejexup.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/94652616531.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613583ff16bb2---tedekalakogomilupakuj.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16131a6468899b---28183619866.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/fukonefevafunowexuto.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/35187760763.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/pupizobamupogakegazejeb.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/21991922770.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143c755c08b5---8647254977.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/58962883889.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/1105745265614503bfac35b.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_off0000b980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB980 16504 bytes
SHA-256: 56292b95818c955e4e8979013877baba783832dd22a2efd2cdd1464e91cf485a
font_01_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 10836 bytes
SHA-256: ec882740ea17edab13a55fefadb743b8896fe41c700e9444c0c25b5d9f62064a

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