Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e40105fed241924…

MALICIOUS

PDF

97.3 KB Created: 2021-08-19 03:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1133533a294ec916806461eb99858a02 SHA-1: cf43755ce534dce3ee7360a5a2aae13dc4ea8066 SHA-256: 3e40105fed241924e080ce2a9de1469fcd8dabe331179c4451d93930447f6018
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites and disposable domains. This suggests the document is part of a link farm or SEO manipulation scheme, potentially designed to distribute further malware or lead users to phishing sites. The embedded JavaScript is likely used to facilitate these actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://havadisname.com/upload/ckfinder/files/zogoja.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/tq0o6hhtkmuj5t01s449v5mko7/nipojibonezaximugu.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/wotalelesike.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f60f67986f9---29701113815.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/p2ripkha5dnpqgllhvhp7osv06/rejirefupalo.pdfIn PDF document text
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/089f0b15332f972a54106dc68cd1918e/49343215156.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0f82c5f73bb3269197196017330b1ee4/61212461576.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/341360d93b5adb70014af512b7646998/pogafozerasezazobujazamuw.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/89172607556.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2ribmab4v2gtkv7h0dknhu6kb3/pulitolesizekidag.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da50dad3831---26604068861.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d8477f28291d6f305e2fb603676934b/kufufoxavig.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/58772092360.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105270252224948.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e51502ae6---3823587461.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210616_D556C3BDCDF2A6B1.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/ridazozaxufitoni.pdfIn PDF document text
    • http://renovator.cz/files/file/rakedubawigegopuzorar.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61b06fdbf---53390326162.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/39172934843.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e06e056bd9e---31320399718.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/51280678950.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/0d7ccdf9e98c47695deb318c4b7257aa/muluripeginaxisobivuk.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/kj0kg1ggbj83h0ro2t7ocmospe/3675768442.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9aafd6ea8---watunozevosolovima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=which+of+the+five+moral+dimensions+of+the+information+age+does+spamming+raisePDF 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_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 11128 bytes
SHA-256: eba6a8368e117bf184c2942414a8608b196f3f57f839ea4692f4587b8d16449a
font_01_sfnt_off00012f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 17864 bytes
SHA-256: a843483df9c05a6cda1fc8e4f5b8c3315612c5a547d8a4b3e35c08fb3b736ec2
font_02_sfnt_off00015dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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