Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae30d0367dfc024d…

MALICIOUS

PDF

101.3 KB Created: 2021-10-07 23:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a1631022f3824371b5eea5cc2243227b SHA-1: 09ce97db9590eeabfe264102e6fa5cdf0680ff5d SHA-256: ae30d0367dfc024de17aff341a5ba45d893ca7f53bca2dd5a0a5fbc4addfe0f7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ClamAV detection and heuristic firings indicate this PDF is designed to lead users to malicious content, likely for phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3897

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=baton+rouge+magnet+high+school+ranking PDF link annotation
    • https://media-get.ru/userfiles/files/25103371041.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/71504579342.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/kozovum.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/texuze.pdfIn PDF document text
    • http://hkacca.com/userfiles/32990545747.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/sotexa.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/36550987603.pdfIn PDF document text
    • http://mfahk.com/upload/files/63089644344.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c0f82deb80cb0669f02e4f33ecd4fd12/68995950662.pdfIn PDF document text
    • http://ebara.com.hk/ckfinder/Zenith/userfiles/files/44008774214.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/76100412997.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/95ea80d6d531b513623fc23acc69cc13/92758935341.pdfIn PDF document text
    • http://telefoonindex.nl/images/uploads/sukazoxopubedek.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/97928903697.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/744114892.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/2942300000.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///dujufomokef.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/27592321996.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/kijex.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615b10bca1fee---28459899694.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/fixugedumododagimaduto.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090310513173499.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138ec8d371ee---lubibuwikurapig.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/68619221313.pdfIn 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_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 10924 bytes
SHA-256: b2bad3fca4044324ad7aa1b5baed07440522d4539942a3fe9e2880eb617b969f
font_01_sfnt_off000145c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C3 21548 bytes
SHA-256: ff2453528e4779afca117ddd54b7e4325ec54da849ee66ac197e4e90c18883d6
font_02_sfnt_off00017de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1