Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3dc54ef15d1a02…

MALICIOUS

PDF

76.0 KB Created: 2021-08-05 02:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a3ee5acbb395fcbc940ee2db7cfb4dea SHA-1: 8493719b3bcdea81ac45f01c5ca6ba534600cded SHA-256: 3c3dc54ef15d1a02f882567dc32059b6eb9d77279099860026899a52a6e12aa7
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous external URIs, many of which point to compromised CMS upload storage, suggesting an attempt to lure users to malicious content or phishing sites. The presence of multiple links on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5248

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://binarbaidfabrication.com/public_html/userfiles/file/bipeduvufesulitutower.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ff23e034---polupimurototozofifela.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608445d47859f---nibipafotuzarewod.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/7nuko31mfbvegu70obuddd5ue4/53479092141.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/40cfcedb283fbcc175ca550e5a5346fa/57068646352.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/76206259959.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/8uei1o0noqh9ragb343e8mjmjl/1714257094.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/dc50a14641d75ac624d9ef3ac7464acc/61146273969.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b361b27c4---tomut.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/112e92f72277c8bf1a4a90f6754b1020/81134198723.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/d375a05s03ar7cacp6rsvr6jim/gesofolonofibegufudof.pdfIn PDF document text
    • https://ancoraeducacion.com/images/naxixuxadawa.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/jitujewu.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/41633875023.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/gogewurolu.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/66700186928.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/vedab.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/nasajojiwopeko.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/22935261358.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/dalexobi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16083577418a30---dilutadisesibagudafinis.pdfIn PDF document text
    • https://lojaortigas.com/ckfinder/files/66592523647.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/23949931222.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tulozaborafut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ali+kundilli+2+full+izle+1080pPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/boruwepefigabuwapoweb.pdfIn PDF document text
    • 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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 22520 bytes
SHA-256: 36730331b363d69d309579669e82ffb6d9cac5d579f6c69d160126a3be9890de
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 10576 bytes
SHA-256: c54fce85748d0069e761d346e1db214c79104bbafb4867d30296500fdea968c2