Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb93fa2159fb5a93…

MALICIOUS

PDF

61.3 KB Created: 2021-06-03 20:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 089dbcb9debf7311f9420f04855955c3 SHA-1: c7d006e7cf3ff46eb107da71f2d5749644d2a40a SHA-256: fb93fa2159fb5a930f937228de5bdaf23552569c46df5f327ea5bce988037a02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised websites and disposable hosting, disguised as a driver download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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=brother+ql-570+driver
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/21018723721.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/9q5imttofuv29vbfbfnsgt61sj/31559325262.pdf
    • http://afghansolar.com/userfiles/file/50702688042.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/f21600cdf40c7c40db4430b6e056589a/65354180205.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bac12c19e---3942231108.pdf
    • http://webursitet.org/Files/file/10400422584.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/blf62civd35fa9g7c1ipkvkb06/murozenadolo.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099d427ef258---damitadinobiwod.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/doxaragokumedet.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a39ddaafa1d4f28d4b8b661a859e6b4a/37273036229.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/1td39nh1jc76ot5r40gk1t02nn/87505043809.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/u6022c3agccmvj66gmt6qrpup4/dakix.pdf
    • http://batiment-tunisie.com/userfiles/file/70584143706.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3dlqi553v7uomfafsac9ps57nd/xuzedokixe.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/pv0ou43nvneini7lsirhr6nmd1/90281843102.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a48e80507---pajoluxozufosewitubumiram.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76e.bin
4d1b6980e37d5f2f2cc18ed5e0a2e2d8ea9db2dcb3ce2858156f7557d2f67cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76E 5140 bytes

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