Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d001f52babfa1…

MALICIOUS

PDF

79.6 KB Created: 2021-09-23 01:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7cc926c008930b0d140ac42251493713 SHA-1: 8c2dead8dcdd2cb7ef017055dafcb2a1d9909677 SHA-256: b32d001f52babfa17385ef12abf55956e36f05e76db63ec0ab2d42e947c7b51d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests exploitation of content management systems. The embedded URLs likely serve to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4862

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://irlanc.ru/uplcv?utm_term=get+unlimited+likes+on+instagram PDF link annotation
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134fd54747fc---71379064687.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/suvit.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/28014200961.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161382ca5b30b4---wozuroxufinedu.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/wutetudonodo.pdfIn PDF document text
    • http://freetds.net/userfiles/file/1415685746.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/48114015919.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/63751232683.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/161421cac16053---tibewazog.pdfIn PDF document text
    • https://pecsikult.hu/files/file/27324913404.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/43679890548.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/58793317325.pdfIn PDF document text
    • https://interconformity.ro/images/file/97189980879.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/fematujitoxilepuwulira.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d900aa7744f0e5a85be199e0100272fa/rurebatiwobixorivuname.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/sakevasiguvasewe.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/4742110803.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/refabetapu.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/zerenubezirisozaj.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/24239633078.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210901131237706023ebo8i9b9s4nb.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5478b78f7---rebukevokibivipom.pdfIn PDF document text
    • 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_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 10820 bytes
SHA-256: bcda84722b9cd42a4d93018b5148a4f0cfc4104f8cead7bbc1fd3bc5819df03e
font_01_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.