Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e663746571660b…

MALICIOUS

PDF

77.2 KB Created: 2021-09-08 03:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2286499e8fe74ed4d5e1bf034ced831b SHA-1: 9cd6cc46d999cc40a803800c87c89ec9f8d48f3d SHA-256: 06e663746571660b5941f236688a75365f220ebc9c4002099c25880d66ea6560
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing lures. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using disposable hosting and compromised CMS uploads to host malicious content. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://wastran.ru/uplcv?utm_term=ct+medicaid+provider+manual PDF link annotation
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/xegotuzub.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/xijabomawow.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/sanunuja.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/timuzaporote.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f2b6f2752---4661006620.pdfIn PDF document text
    • http://bfo-walkforhope.com/clients/e/eb/ebd0efab9cd97e953e90891d9eec7aad/File/rujejuzabomuted.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/puvulewewepenosaxupabom.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077e34c719d8---lusugirufalurilifugow.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0984e1d0bf---62005097324.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/zagit.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/68707869563.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/logemotisadibu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/49dcor1jo89fm5kioq393eqne6/wetinivodutesikixe.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/subof.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/813e668d479cdb9100ade115ea5393c9/1268674833.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5f375b057ddac6a505ce78112fa3a1e8/3948583283.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021072616092313.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/moguvoda.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac59ac9a3bb---17932280742.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/89843449978.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/mt3fs0h5l9e1aemocqa3b206c0/vumirofumunegazotonek.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 17348 bytes
SHA-256: a02766c9704820b84c705ac0df7d5cef3563924dd1905850c2b5a1ae4f34964d
font_02_sfnt_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 10704 bytes
SHA-256: 98a126d57bbcc5b2db4840df68abaed95f750d2aa36bc56e7645a7aa1dc99a21

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