Malicious PDF — malware analysis report

Static analysis result for SHA-256 822c3741756258f4…

MALICIOUS

PDF

78.2 KB Created: 2021-09-09 22:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a7979e9d7525687f1fb01a41fe0d8bfe SHA-1: 87f3028786ba8d9a88deefd42d07ceac63e57f9e SHA-256: 822c3741756258f4f6650a8ac208f711a6e03fc378482a64cde5d8d40bd6cc46
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, some of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to appear legitimate, further supporting a malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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 http://huspanda.com/data/ckfinder/files/tivapilidifopar.pdf In PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/57975624887.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/nataxifetabefukosi.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/8046575349.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/sazes.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/mowilomamumitaxoxepejuvo.pdfIn PDF document text
    • http://blueyee.com/upload/file/100013044227.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/zaredamofufivabo.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/novezilajuvu.pdfIn PDF document text
    • https://basisangka.com/contents/files/zubixojowezigimuguxenaxa.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/luwirenadumijewojirofebab.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/fuzupaza.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/03dd4c2c92328a92d4b02009d8258559/70652948035.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2962176f---25099825988.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161393d29f2677---28523043841.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396f0fae6af---darabevuzavip.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/29742267047.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/felusenoga.pdfIn PDF document text
    • http://njchemland.com/upload/files/jukobivoganujakisuzawotub.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/79802808504.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/28639088734.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/vorusafefereke.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/39917834737.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/sajokodudukuzipurabizopox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=install+stock+rom+without+pcPDF link annotation
    • https://easyown.ddproperty.com/datas/files/54588438443.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_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 10736 bytes
SHA-256: 0d0fc3715ea22c1255fe901f6302bcbd08a66cf5ce7be1a2aefc16a431ba1589
font_01_sfnt_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 18172 bytes
SHA-256: 5cfe3b4c1924a8c609b75e5c7c4301924e425e2df7ced8bfe83d92d1b949cc81

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