Malicious PDF — malware analysis report

Static analysis result for SHA-256 3753d9e9e1bd6187…

MALICIOUS

PDF

70.3 KB Created: 2021-09-07 15:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: cd290350b1156025462a2b47d1a6d55e SHA-1: da49535f42f87e3323e4e01f65f30818b437963d SHA-256: 3753d9e9e1bd61877992e11c3320bfdfce731cc3b74f8c8d0b88e7f6ab3bcfdc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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=4th+grade+spelling+worksheets+free PDF link annotation
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/174a077b1d41e99f5fb49e20cf6d24a4/91994858763.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/korakitef.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a5cf66592---mebetedopon.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pldil96qagvcrm30ggtibsv3rn/muzewokojumo.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///27461697845.pdfIn PDF document text
    • https://loctra.net/userfiles/file/gisenudunezuwo.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/vokukeg.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106c5b49216e---35661338356.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0fce8675b27b61daf95f2bbb0751cf3d/tezixibufitog.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/zukagepogefenavuvudavu.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c9883a21521924fc958ed7e53a4aa663/39084104072.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/mowebadusaxeku.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/xojanamonetek.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/49875611718.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a79fec63392---gujudabu.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/vekofajadujokaw.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c98e31106---wamosovajinokoj.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/8450043240.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/tuxumegonuxarexatidop.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/85826615808.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/lavararemoxilamudafo.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161219696e12fb---84762283470.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/vupizedevu.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/41506759639.pdfIn PDF document text
    • http://change4best.ru/upload/file/titotixujipo.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_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 18708 bytes
SHA-256: 0acf9e0a93b8980863838923f7778dcf2c43fccf10e5122b76450d9f4f53dfe2

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