Malicious PDF — malware analysis report

Static analysis result for SHA-256 744fa7dfe50a6c05…

MALICIOUS

PDF

66.3 KB Created: 2021-09-02 05:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 607bd79cef5e9d3fbae83182d486edf2 SHA-1: bc7627eb7217e75147d32bb1cc788557086ebbbb SHA-256: 744fa7dfe50a6c054c718ce68a23d611f04a88db8644896e89fe1fdc185c0812
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting. The primary function appears to be redirecting users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

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://synerhu.ru/uplcv?utm_term=the+intervention+sniper+rifle PDF link annotation
    • http://pc75.net/upfiles/file/1626880708.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5f26dddf6267dbbb5962d88da81c5577/6234529207.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc56669a6---toliwalafizagixeg.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0a92ccf6bc13e1047aedde2016e76afc/kovojewoxope.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4mcece366vl67gltumrbgpabnh/begobogufav.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/4mplejv9eqq732g5h31b3g1533/23395108330.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/64503478688.pdfIn PDF document text
    • http://beiks.info/public/file/35220162829.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/98543f6ea069448ff25d727ce562ea54/62859879531.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3c0a82c0---papoteribufamis.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d29a3c035---tojorudinokukamafuxor.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d083ac1ee9---40576217119.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/66347662144.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/runilowufoluzis.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021070708495273499.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16080f22636b4d---jokawu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608517bd899a1---kofakekuwipanorujigi.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/lo78oqg2f02lhrqe2ko410nhak/sewitigodenokawu.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/72053802852.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/muwumasaxumetiduxelala.pdfIn PDF document text
    • http://wirheiraten.de/images/file/vazufaj.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/gaparaduva.pdfIn PDF document text
    • https://highrise.pl/file/woxuvikozig.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210722105345.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_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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