Malicious PDF — malware analysis report

Static analysis result for SHA-256 7506775c3ee2f077…

MALICIOUS

PDF

78.0 KB Created: 2021-07-30 06:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78de9f0abd63208087fbc1f0d5b30c48 SHA-1: d6c9087a868c49e8f98e83b797208c27707d4b39 SHA-256: 7506775c3ee2f077cd434f971048035373b89170651f4865b5a556129252fcfc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document identified by ClamAV as 'Pdf.Phishing.Trojan'. Static analysis revealed multiple heuristics indicating a link farm hosted on compromised WordPress sites and disposable domains. These links likely serve as lures to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://minhquoc.vn/ckfinder/userfiles/files/lalaf.pdf In PDF document text
    • https://anukulagrotech.com/userfiles/file/zefazeguliwugefusimanatot.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc662ddd11---maporikis.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/93279662186.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/vurogikewesi.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210616163158_2117698567.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/55751224375.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb1ebfccb---68798051052.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/5677647745.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/31502464550.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/9028245441.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/zokopomos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6fb126f16---fimowevusenokijike.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9bec9b550---23566359891.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/70315079694.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/55d47757daf7c6445af9e039528d6653/6337522222.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/56536728220.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b2ee965c---62121727083.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/zanosufatobonitizudix.pdfIn PDF document text
    • http://dentherapia.hu/files/file/semedebipido.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/zusaturutedifaw.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/busuxuvulo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609112d838edd---gomonibe.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/wibalapanerajegusatofivus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+use+cheats+in+free+ds+emulatorPDF 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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 17764 bytes
SHA-256: fa25ff41c40346a23e5192904bcac90d3f4960a390bcb9ba52026e199f3c0ca1

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