Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56df1d4356d9b1c…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 01:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc51f662548eb1148bfeac9c1b38c0e2 SHA-1: db15eb4574b6042ae0cd2fbba9acaed05cfa8818 SHA-256: d56df1d4356d9b1c41dfc31300d6731f0fb0e1740046a973639945a2af2c4d64
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. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7126

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 http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/dogaxigaxurefipuja.pdf In PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/20479957943.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450c18d010a---mumesigit.pdfIn PDF document text
    • https://wsbtitan.com/images/file/13541183110.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/viwumexet.pdfIn PDF document text
    • http://onelove.cz/file/xusugeku.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/42057244127.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210916_D7AE16D7B7CC2ECD.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450a2329cb6---28850620919.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/97253682315.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/xetaxobawibakijazoz.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/jigipuxokufawimidaz.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/xorirakemejasobebivenetal.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/31913559265.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/22323479652.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139c59f9ab0f---64111170245.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/76576134961.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/49802182577.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210902_115952.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/30629667545.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161429ad27b15b---75074719494.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/1192603379.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/melegutodugeneruxasip.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/43353843167.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/kajifivurebume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=watch+it+chapter+1+putlockerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 10436 bytes
SHA-256: 14a5d8b978fed1f56069c1356aa1ea6bd452f517a682269a88a9833d9b93df13

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