Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74b80a5b762ac41…

MALICIOUS

PDF

73.5 KB Created: 2021-09-02 16:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 794d5e2c018f14988c8e5fddd273ace3 SHA-1: 79d92feddc762b5edcc7bff925ea6b0e66fc25b1 SHA-256: d74b80a5b762ac41a22035bef9e25fe26fb99fb253bf834ffa35008a1efbc735
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://mp-journal.com/media/file/zalesikuvatowusuze.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e5416c13c---metazozosonox.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/91651294149.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a99e5ce89e7---kigitisexikuvipovukop.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/vigofazitekolinekomapifow.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/32d873576884c92e4b1e44beb508bc28/19002993401.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/60357971640.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52fb33cc4---20123491772.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/g1fsq12ckfv6sp18sg02b9hokc/popevenojurepojiletozuni.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/6v14d81jjbb7g27pde5su7tr9i/18777846741.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/45c47c25a82b9625cc2ce3016295874b/44450958786.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/kisisigikelik.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/c57qdisd69p8r36q1lgubgkt2s/xutaziwaguvemowiwejapo.pdfIn PDF document text
    • https://ebooksweb.net/files/file/lawapewesova.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/35693535794.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110cef090093---savamegalozuwake.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ac1a512d---regafozezariwedofaso.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb033316e4---tizotanuluxutejumawe.pdfIn PDF document text
    • http://ridendo.cz/files/file/fukenonem.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/tusozatipaluw.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/67960068920.pdfIn PDF document text
    • https://airbays.com/userfiles/file/86386597246.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716b87b9b6f---joguvufitemenodekun.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/bb03482ee26d471fb8f24a499bcbd95d/tomagisibewasaku.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/71721335094.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=medical+terminology+prefix+and+suffix+pdfPDF 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_off0000bf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 15260 bytes
SHA-256: a7fe9893aadb27a8c33f2aca723c054e3c702d78639fe626fcf2a8b63f3b15b9
font_02_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 11272 bytes
SHA-256: 447fb299ef8df470d242f076167d79231266679840440f5b7ad52aceac69f28c

Open this report in the interactive analyzer, or submit your own file for analysis.