Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e701ed06f2abc73…

MALICIOUS

PDF

80.0 KB Created: 2021-07-19 13:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0ee6c05f78a3ef971d87cdfc687dfd70 SHA-1: dd320a291f059e7d7acba455de62631480d38665 SHA-256: 5e701ed06f2abc73015aa7b1f0e40f1161c004cc9b93c4dd16bad0a94986d704
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress upload directories. The ClamAV detection and the heuristic firings indicate this file is a phishing or malware distribution lure. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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.
  • 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
  • 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://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087d1296e0f8---65670989084.pdf In PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f21383008da---zilagusij.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/vagudok.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/uv6s5vo2h9desme5fpjdpl53m8/lolenoverepatesozo.pdfIn PDF document text
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/78273815174.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/lagetifamapebisugakejeseb.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160806b242a5cd---30016742827.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/1a5c2ee76be74cbf52bfbc9a7d17e924/dofetonusanopanevotu.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd60f8a7048---26842175356.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/ninopalekesexovaj.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa57303ed---64392001665.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lobetegujukep.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f80933a7c---molupadunotifavewu.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/balenosira.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084be5f6b5a7---febotiw.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/37021495992.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/48706064198.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb4f70bc7---labixogozifuxipomunaz.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-6-4/20210604082952404720.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/dt5ovnm1stdkd433d1g63bhuo2/90843743163.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729913a4190---61006993464.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/54014787972.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/87173315182.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/ad0e262b6dc0a0545a86911229c7f020/kisexesox.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/mojufosakavosojejem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+find+hidden+sheets+in+excelPDF link annotation
    • 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_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 16900 bytes
SHA-256: f9f93d3b841256c7d8ab03f2055814b5beddf59cd846431daa88df25de93a92b