Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c7645adc375fbe…

MALICIOUS

PDF

57.7 KB Created: 2021-06-07 17:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4c79cfe994561c21cef95fb084ab1415 SHA-1: 541ed0ed8cf043464369f9cf43c72543f7717e17 SHA-256: d3c7645adc375fbe628b220f61eed3edcd02af8dbab1717be1295b5bae327fd5
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely serve to redirect users to malicious content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8411

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://wastran.ru/uplcv?utm_term=diet+snapple+peach+tea+packets+caffeine PDF link annotation
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/22970aba616d1c061d0c922b21d80034/wujutijidafukufakevug.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2bac14e61---mabonetiwogezagijokarap.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kufesalodijixifumara.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8141c8af74---taruvovemadeserebat.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/hecibdlaq08gp09n5ts9slbkm3/gepodowapo.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/saxubezojin.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160afb90ebc1a3---xoporotabufunusoluxose.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2a2185ae6fca8956d346215f44927017/22467709809.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052307424273499.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af0433b594---33763608199.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/90d8050dc125d9bc60e5c821494ef649/kifedu.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/61161deb051fccd55df06882764c485f/wekosajibibimitawoteduzim.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/pezitarufuzigeterogixov.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/af2949f27d87f9e74b542df66109e13e/vasalop.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb3be2bd9a---wabebux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD854 5072 bytes
SHA-256: 60150c5e1bc943aa702208ea42bbd04f7df1e9340d49fe852dd833b59bb69c44

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