Malicious PDF — malware analysis report

Static analysis result for SHA-256 19114d05abfc1ba7…

MALICIOUS

PDF

87.3 KB Created: 2021-09-17 23:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9889cfc1ebce46274bb67a3a073a8c62 SHA-1: bef48cc57ddaea1872e1a6135a469dfc4bd758ca SHA-256: 19114d05abfc1ba7fa1f72c709a774941f7cfeb4c72c12ba85ad81af583cd139
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on potentially compromised or disposable domains. The presence of numerous links, including one hosted on 'abapaposentados.com.br' which is flagged as a compromised CMS upload, suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rsvforum.com/userfiles/file/59524086149.pdf In PDF document text
    • http://elfast.ru/userfiles/file/12767084403.pdfIn PDF document text
    • http://agro-partner.com/Image/files/77865201389.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/21795285119.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/binozok.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/14359564482.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/73191521823.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/39180468552.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161392fe6d7081---miwekitukafutirol.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/39987456585.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613700c5e6e13---loduwofizefizisifuravuso.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/f02c737dd8b6df6dc00bd75601f398d2/poxubirugisa.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/925d3149733c2e2b4560405d8b1f1c25/jexevebujapis.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/14974908230.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/zojulabakeposadijije.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/doxokubuvokimurun.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/95156261411.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/12331373369.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/sosajokakazokagin.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/1809793850.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161441e783b630---gududebegirixi.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vuxejorisutib.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/bibowefovafatujijeruxulox.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/20003333415.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/samazavosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=messenger+pc+apkPDF 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_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 18288 bytes
SHA-256: d695d2ffcfe9e1ca5cb9a6714dc8259a608bf02aa1cbf6f0a52f8a3c392c99d8
font_01_sfnt_off00012078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12078 10280 bytes
SHA-256: 47f1008f1db6d00c6753192722f215931da34e3b6404408a9b47209cf554142b
font_02_sfnt_off000137c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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