Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaadb2c5eb5b06cc…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 11:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 797239d0bda2362213d7f65b4ea3341a SHA-1: ef6c96c6372e7d1035398abe85e70a4b57b5ead2 SHA-256: eaadb2c5eb5b06ccb49cacb3b1415edb8fa1f5c1f1621eb958cffc38264c9709
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery mechanism. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7921

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://drafthe.ru/uplcv?utm_term=being+and+time+martin+heidegger+pdf PDF link annotation
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2df10e5dd---6471284131.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/b2694ca630d65002be0eb03493594dcb/47701611880.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/11661bd3bf297624cbf49b1e281486e3/62100545326.pdfIn PDF document text
    • https://wrd13.com/force/file/tugofibamezeduta.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/jipopos.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/36346001576.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b685cc9ff7---niforivadawaweriba.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a811a05434---gusukizozakezarigunafut.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/72540636689.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/067d0c11e63d5df4e0720b15e0b47018/15099218183.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/hbgjgfrjhrfoegoghsugapk36k/xuzajugarut.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d87c2bd9d---11770101491.pdfIn PDF document text
    • http://wenxuezj.com/images/File/26823211383.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3786e8c6cb---74947838670.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/f3e0facf476ce93571885508460b69fd/sonewoxagipu.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/tudegad.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/kumibelorox.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e297ed41c92---dazukebesuk.pdfIn PDF document text
    • http://fourfoods.com/images/files/72692813164.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/vajeravikaxaponemupojajo.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210907003804_nhlczl.pdfIn PDF document text
    • 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
font_00_sfnt_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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