Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa668d12e75c3c7e…

MALICIOUS

PDF

69.8 KB Created: 2021-09-23 23:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4b40870d5e8c672726ffd0bd555adeaa SHA-1: 1826e3daeb2999e3abb3cec0adfd56e54ced262b SHA-256: fa668d12e75c3c7ecdc5799fdaa352e95db7493c8a508738dc27de306bc86ba3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also exhibits characteristics of a link farm, with numerous URLs pointing to other PDF files hosted on compromised WordPress sites and disposable domains. These findings, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://amandatour.ru/js/ckfinder/userfiles/files/wusagoze.pdf In PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/82538089786.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/78092750724.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/momaferojugovovokojito.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161460e8c9de5c---dapifidilimukujoferu.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/6742898226.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/9200016de6541c76a436e02bb7705366/jekobodabijulux.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/69781351389.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/257a52a6f1f4f98c0cb36f91567b6448/84107893393.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/52025733860.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/16735998743.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc027766df---19694142114.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/lijonikekoxetomiv.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/2387795075.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/887eb0abc608c661bc5968c3ef88da6a/gineru.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/poxenikusabokojutosu.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/68876312732.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/44422790403.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/vozigokepafevajowesebe.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/78996482404.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/21537375687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=mute+video+recording+androidPDF 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_off0000b1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C1 15820 bytes
SHA-256: 3bb483ad70564c64493cd73e9e5514d298ea87ac6ad9d19da1bb2adbb9465d56
font_02_sfnt_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10488 bytes
SHA-256: 00b5baf594834bb40f3102dc7f9ffb4faa132ec2cc01821169ec7b27cde5261b

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