Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7188630959289a5…

MALICIOUS

PDF

69.3 KB Created: 2021-09-16 13:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e1694d452b7d5fa36c1b8a2b84904c8a SHA-1: db8cc0728fb021cdf5460275b62280da29705462 SHA-256: e7188630959289a551f8c2597196b57a035a04da76c7834df19e43efc7c89682
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or appear to be disposable. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The document's structure suggests it's designed to lure users into clicking these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5522

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://lotte-ppta.net/beta/assets/file/bawodopafifurugiv.pdf In PDF document text
    • https://stiglic.sk/userfiles/file/49167392617.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7dbad8cdb---57501003813.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366c9c56f8c---wejorefopo.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec473f7e0---ditimevudijinejomunif.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/4148115262.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/penobujewawej.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/tusibubekig.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/mafimemujozise.pdfIn PDF document text
    • http://falerisztika.hu/tmp/xufapew.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6o4i2ltc2mj9v7d5dt1ipqpitl/97243041758.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wafobujarutu.pdfIn PDF document text
    • https://brod-plovdiv.com/images/deneroze.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/loketudaduxotulawidi.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/72964969167.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/temaso.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/koxavokagi.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/xolilaropef.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/viragida.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc23965245---pewuvoj.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/kofonomibezugalelujal.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/4b7d1288caae05a416f33a7afe1ebf50/95626111253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=invention+and+inventors+list+pdfPDF link annotation
    • 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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 10508 bytes
SHA-256: e1936083b20cc98006c4a00cec11acdd84104c0f935fa0d2deccd83be58ef4d3

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