Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd11e3a53bd5c5ae…

MALICIOUS

PDF

70.6 KB Created: 2021-09-06 13:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d43f624e0ba4e71498b4a5d9530e3f5b SHA-1: 179dc2fdd552951997b47e9a818fd7f4091933ef SHA-256: dd11e3a53bd5c5aea38a52b521cebac92cb3734b59d296e51e5f1b9cdb3c718d
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5623

Heuristics 5

  • 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
  • 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://yingzhaoliuart.com/upload/file/31104579936.pdf In PDF document text
    • http://terezmisszio.eu/files/file/ridagofumalutizesir.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/80b75354218df2a248e3553fd614e570/13538629543.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/66438343746.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/gijotogagepimavunuj.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf6fe2cde4494d4031e822e55fdc2b41/vuxexa.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085659525437---nagirolipogozejosox.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/zofib.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/44291593925.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/11256623486.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ae4593651---teses.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c56015bb6ab---88619788355.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161201cd48f87a---52226673733.pdfIn PDF document text
    • http://hibertek.com/image/files/20210623_085539.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/85260991218.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4f65dc1e721cc7e3068920835723c469/38612850889.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/givuzogaluxozug.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/360eb2f7765df2013d64799ed5580c81/92044970840.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/nefimigogijejemoxi.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021071304532373499.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/0r8jkkrs2aqpqmm1nlh5o78v5g/78363635181.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/sopumaloz.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/48662914257.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607abf1f24c28---78541903924.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/lefoponedita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=here+comes+noddy+again+pdfPDF 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_off0000d2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B9 18568 bytes
SHA-256: 242283db2fdc48c3a04f1ed9cc2221ae839aed57c27298086e8ae0bf22643a5d
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1