Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c029a4c1e242282…

MALICIOUS

PDF

67.0 KB Created: 2021-08-09 16:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7a3e0becd6e46b66f6fa842fec0087c1 SHA-1: 512d649d5401422b4f3fe342a825d3741fea4e72 SHA-256: 3c029a4c1e242282f5b9ced9247605e9a8572cad0a83c313f26abb65156b6f1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9143

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://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608025f008799---32409427684.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb9077cb8---sopejolukaditin.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/jofunegurame.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0ec4lnr53lh964kafob8u6aae2/63276406222.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/50093532183.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/telorev.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fcfb9b5c567275a71e875e3e9eb437d9/vofoxarurut.pdfIn PDF document text
    • https://artbynela.com/uploads/file/kixilowefavatijovaguwawup.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610c999515961---gobim.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bafcd908f4---79388339005.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e923e3c33---kivobudubalalerobeb.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb07dc24d5---wekalalosusosivokixurumow.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/vivewamimodenijiro.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fccfe19ef94---kujaramuvibuzibeto.pdfIn PDF document text
    • http://licausi.it/userfiles/files/xudekiwetefikegufirela.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/junojipuxamidoripirasulo.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/93742796318.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/dibikukuzupiluvelosawom.pdfIn PDF document text
    • http://keramann.ru/uploads/files/37516872566.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/weleraxatunubem.pdfIn PDF document text
    • https://landi-bg.com/images/file/4407418363.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/70195878550.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/jiliwa.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ef179a2faf626212caaf3a0c2eb8b952/15176154217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=algebra+2+chapter+1+practice+workbook+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d03e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD03E 17944 bytes
SHA-256: 31fb0b2007aebf51cfa0ba5234b930a8597a23e6d3b5914f1853f21bf2bb5108

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