Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade28e87ea730444…

MALICIOUS

PDF

64.0 KB Created: 2021-05-09 20:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b86ddcc7969a3c6707489f5781ffde SHA-1: 29772de00edc8fc1894cac7c984a555d0eb1d65e SHA-256: ade28e87ea73044471b76a5c8ce3518b9bb091e68c187022dec7802fd0a15632
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content or phishing for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, and the structure suggests it's part of a phishing campaign. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4l1cbiqortoiagik2d4r26gd3s/79850913052.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929f9e4de4e---31517747266.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7e3afad0---2948762723.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078be1b62b59---towarexixufeninutusa.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16091ebc2b8668---6604488077.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c743d23dfb---23643499153.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/cbf56e65a4c8c53bed3e9685f5dc2a07/dulusepirujavukotefiner.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd7b69f78---wodelisudasereludax.pdf
    • http://antifftech.com/uploadfile/file/%5C/2021050720232662.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d1ebbedc27d42d0e997b5aadae205793/kupipidobibumetumoja.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b1205ab88---boniwesafomuf.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746076d3c5a---xujilimap.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f4496f68---verexumow.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/aa5730522dae22a593948aa6b8d595c2/mubesu.pdf
    • https://xanbiente.de/userfiles/file/83375564449.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084236cc538b---11274064411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=must+have+apps+2019+android
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38a.bin
c69ea6bb295d50a947072e214966bcfd8cd73eb4164a8e451ec55aaf1b4880cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 5560 bytes

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