Malicious PDF — malware analysis report

Static analysis result for SHA-256 8028f81781e48e03…

MALICIOUS

PDF

58.2 KB Created: 2021-09-03 22:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a1ab6563114a3c7864a3712f89640233 SHA-1: 6d191ef05ac25b829de41d5d4df6dd09ca767565 SHA-256: 8028f81781e48e0322c5ff7c12556f32f8976bbfd4dd2a6535686dd4420cc961
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious document used as an initial attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7333

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://atraba-holding.com/userfiles/file/sefizisonenixamuwabo.pdf In PDF document text
    • http://dlt-nkp.com/fileupload//file/2816291498.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/bikunimiwudokupi.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/20537392712.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/38901291002.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83719237b3---39481088908.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/61614214435.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/2730568283.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/ritaxuruzipuw.pdfIn PDF document text
    • https://defi128.com/userfiles/files/91796620995.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5aba5964a---54994590758.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0795cae639efb74be81fcd4f3a6fec91/28720967180.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/eae6732aa2f4bd3e625a90978546dbf3/tajewo.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c95f47ac6a8eddd3bfae21c32d3a4b39/jajorejozugikijugetufax.pdfIn PDF document text
    • http://reunionfamily.com/clients/6/6c/6c58f7de0247188f02debbcda007d80b/File/72754649550.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/83b43aae62db4b5bd23686a3d861dd62/jufudonifivaxumojanijuv.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/58852361792.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/subezezifub.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/lovegefunup.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/naxarupofikuxenelunuge.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a0533c2c1---jeruzu.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/10466228692.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/panonebugiwabonod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cambridge+dictionary+pdf+freePDF 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_off0000c5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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