Malicious PDF — malware analysis report

Static analysis result for SHA-256 200600044d73fbad…

MALICIOUS

PDF

71.6 KB Created: 2021-07-21 10:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 56d0cf57d8a9e3c1156fc793e83926c3 SHA-1: 40784b7eaeefefd93e59c763fdaf9932f36aeb5f SHA-256: 200600044d73fbadd5101b9b076846fad374181af5b5b17111a6d8cef3e406b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7307

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 http://markasib.ru/ckfinder/userfiles/files/jivufanaditozatitufitiju.pdf In PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/99393908074.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/cff804be570eb2199e74e60b82fced20/xawidonuxujemusidop.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/povawixinesowudax.pdfIn PDF document text
    • http://mosjob.ru/images/file/21997433379.pdfIn PDF document text
    • http://ihdbd.org/upload/files/jakamokigojufedizal.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/tukarivafebaku.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/powom.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/70607978341.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/72ee67d4474687d6bcaf49a5ceb9813b/15210809431.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/5d32b0k4m2p21r7dkddb2rbnqp/63259935862.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078cd9914852---94182716953.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9796086fea8c982bed666a7369eca574/ladofutigiwupilabup.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qeb5qk16tktgg0tf0mj7g1qun5/98464828310.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/kizozotuxuperinas.pdfIn PDF document text
    • http://3asoft.vn/img/files/97578287515.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/5m540fohkiuqe5e4ahuiqiqfk3/86400391963.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/zofusipapunanow.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee25d5cc4f0---84107740077.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/dufesebawiwapajo.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/70388729360.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/e8d1ccf18ecd5344ee3a4c69fcf28c72/56971870389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=an+ember+in+the+ashes+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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