Malicious PDF — malware analysis report

Static analysis result for SHA-256 502d56021049ef0a…

MALICIOUS

PDF

80.3 KB Created: 2021-07-17 18:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d35243785aa16958cfd3685db74917f3 SHA-1: 1d902942374929082c0b59d4931a673fe45fd2ba SHA-256: 502d56021049ef0a3aa06eca194dc13018201c025718494dc98b24eaf4c32abd
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution align with common tactics for initial access via malicious attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7560

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://matsonconstruction.net/userfiles/file/pumipalexa.pdf In PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/lgabje3338qt2a7jsit3u9f8ta/8357823687.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/4726642858.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/56979543523.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/zonikizogubi.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160965959bff67---83079697584.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c62dbb6e2b0---sajiradepumuxigefol.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/54259458260.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/zijujelenejinexaso.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3b036aeca3d051b9c551247a63aa9a87/82450127533.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/tizanexudavumuwuwogomuj.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/1d9001b1e40baf8bc8549342d9b45d92/197261597.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/wobimelenuxapasabofimako.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071961726c0a---43249962469.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/23330482258.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8def07ae1---39404271452.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7cb80bea---50244662426.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/xupilaparituwer.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/6983554089.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/xufiwuralezufudibope.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5aae80e4bf---kutixagalobebugoxabut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ib+physics+ee+examplesPDF 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_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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