Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1800e6ac736d47…

MALICIOUS

PDF

85.9 KB Created: 2021-08-17 09:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2696916281ae96a2ea5d8e801d927c1a SHA-1: 860c1a82d6f7d44c9d09773ae6e968cdadb425b9 SHA-256: 3c1800e6ac736d47b42cf1fc8d55106d7e3639f6c5207ffb3d1fc4942a730722
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. These elements suggest the PDF is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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 http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/futofexovigido.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb19b1cea---80740302908.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16084d03490777---semoguzol.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/zabexovo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b08fc8670ae---47257515571.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/gavuli.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e403651934---venibenonukavo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607980f3b8a81---fiwemuwuse.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5807acd83---676496928.pdfIn PDF document text
    • http://esistore.be/userfiles/file/runuvameje.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/60102073872.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/kvd8h8ja797jdoini91ao92ima/tikewisujajekolezot.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/5ca6746f54f0f7302981edfce37a4040/85310889886.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/8e2fda975343a9e55b75693e1f6b35c9/bemiwozagavaxub.pdfIn PDF document text
    • http://apsons.eu/files/file/madujizolezutawuzilina.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec51c9b499---xuvetazesukuxej.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/mojutetesegasegizimo.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/78864209761.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/60746253998.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/27793659525.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/3681587712.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/46739308160.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/jafadiziputuj.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/mofopot.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98a4475ef---kaxosojaburoki.pdfIn PDF document text
    • https://aromamarketing.md/img/files/4320369118.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/19096478562.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee4be0cefe---xaxeronijimotanisaxavupod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+empty+eureka+altima+bagless+vacuumPDF 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_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 17140 bytes
SHA-256: b1a70a878845fa88101680064057d3cfc43ebfba7d439108e6c9ca002e6e5708
font_01_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF0 11200 bytes
SHA-256: 96f74b015f8921578d611a43d214c7f4f195686b6e33b2e2428df6b4c8986f77

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