Malicious PDF — malware analysis report

Static analysis result for SHA-256 97076ef70fc1d308…

MALICIOUS

PDF

65.9 KB Created: 2021-09-23 00:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dc49d8c30d014ee2aca6e5ff4b4b3228 SHA-1: e903b727628bb4dfa05479ec08bf54dc1cab973b SHA-256: 97076ef70fc1d308976580b3901dfc15fdb653136b75e7bf2089647029178900
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised or disposable hosting sites, one of which is a WordPress upload storage. The presence of external URIs and the overall structure suggest it's designed to lead users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6054

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://pixomot.ru/uplcv?utm_term=how+to+clear+incognito+history+on+android PDF link annotation
    • http://massimosusto.eu/userfiles/files/98338671064.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e28e8991ca75f8a0e38f866ff7581574/66326967753.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/rimatuvavewuterel.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/xurowobadesa.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///peposuvi.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/73197949786.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/77640208510.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/dd4506a7f3e05061d7e91daa6a53d739/53221583817.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/41935869109.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/84931969823.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/98435638973.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161319cdfd77ec---fuzibowegipivatotoke.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/25337257077.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/garilujoxovefizuwix.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/tanolatesaxamaxexavu.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/neripakika.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16149b232c569d---30373619089.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/nikukuwapojoworef.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/81018013653.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/49203173716.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/3833364218.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/vudimavolupelige.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/97340899326.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/punotetadobumalonufebivi.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/tizokumiwewuvorevusun.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/087e42a790a2e3749a7a899d55d48a79/wanobofegexevejisiloji.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 10840 bytes
SHA-256: 373ffe6f61bc25ada5536377631b73ede1ac53abd1f43c4a93159fcad04d31bf