Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe7fac0b75f0ab4…

MALICIOUS

PDF

114.1 KB Created: 2021-09-21 23:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1d4e2e7940372629c0c6f2dc1a1a40ae SHA-1: 7580ab4e1097bbdaa970d24d2698a7eedde1483b SHA-256: bbe7fac0b75f0ab43139dc3a4229628b8a6bf8e2a920cfdffdb4ef8922a39a22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://cructi.ru/uplcv?utm_term=dante+and+aristotle+discover+the+secrets+of+the+universe+pdf PDF link annotation
    • http://www.bluefashion.cz/ckfinder/userfiles/files/nanowenus.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613827122a933---lafeji.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/debevewiketesaxomoxuzuv.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/641q6ng265g3rgfjad5lam5lgu/25224316444.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xafizodajipofa.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/518534698.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109061831385512.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/jge2qertsor7eldekrn4sdjun5/82335310276.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/nivulanepafuvo.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314c6b1f927---61359520289.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/3702810235.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/resizukufiz.pdfIn PDF document text
    • http://erimti.com/userfiles/file/lujiwikataliwamipuda.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/fabojuvarekaniwoketuvijo.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/54043441262.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/48261069994.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/boxidiwiz.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/94446037376.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613298e05b2b1---51778417182.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109050816197761.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/laleb.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/20813751081.pdfIn PDF document text
    • https://ikansambel.com/contents/files/vorevemidowamujufe.pdfIn PDF document text
    • 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_off000153ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C05 10884 bytes
SHA-256: 5ed3ed2f98589a4cc2ced0999b45d504026d0882672e59a1bbd29a90b5839d6d
font_02_sfnt_off00018526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18526 20240 bytes
SHA-256: bbe4d883757b2f2305bd085d89dcea17a24f37429fa25c5952c4e068a83dcf3d

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