Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce2a7404e935472…

MALICIOUS

PDF

86.1 KB Created: 2021-08-03 10:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05ef1965b1b54966bf20ff57d5eca956 SHA-1: 649e44fb71a99e5ed329a72a91de3675aba5f886 SHA-256: 3ce2a7404e93547222161b41758fac5f6b7ca0574a4db0708ccc4d20c03d74e6
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning to redirect users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

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 http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ad76adb14b14c9581ef44fbb17be8fcd/betajafajofuleziwab.pdf In PDF document text
    • https://abugfreemind.com/userfiles/file/fedejutodokimizesipawajo.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bf0918b8---dadimukojojitikonulep.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/86fb0247f30c9fbc7cbb1088f053fd8c/47848422825.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bfa833390c3fab1a2a23e27ad81872be/petoniboka.pdfIn PDF document text
    • https://sanidom.pl/img/file/29283375806.pdfIn PDF document text
    • http://hibertek.com/image/files/20210717_053040.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/655feefcdaac33d703131bd6ad072f9b/39716724867.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/edf2272fd2536faadf93c384716d1a72/xefiwejawigojolusibe.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/gifadufiwagamawefekodo.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/78067066101.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d22e84000---18831566701.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/kobesenegutofajanaxewut.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/91962170677.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/jixop.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e4e8197ab037f3a518c088c5ca0afd99/kidepamuretosiva.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/47b17a500af7300a541de19b7264f5df/72265965370.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/3203348413.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/pijirotulokuwekutimif.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712e4ddd4b5---61103082142.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/39884761155.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609843681730d---simokadomarodulutixubik.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/8100edcbbfcb729409800353f00688a0/68848349672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+the+lewis+structure+of+scl2PDF 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_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10628 bytes
SHA-256: ef4b53af13e81e74131913005d0c90a88e27f2b51d805256191783dffe78a736
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 17488 bytes
SHA-256: a359aebdd3a9a76df7184453f06168526331b864e2ffb97b1530ba4388914e84
font_02_sfnt_off000132ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1