Malicious PDF — malware analysis report

Static analysis result for SHA-256 13670b64d3771810…

MALICIOUS

PDF

78.1 KB Created: 2021-06-26 04:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5035ce6dc87e0db23206e37dafc318b2 SHA-1: 969eebdec0c94205703d3bd7010b2297f83dec9a SHA-256: 13670b64d37718109222e485bbdcc50e023723ae8e607b35a540c463d02d913e
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection indicates this is a known phishing or trojan variant. The presence of a link farm suggests the primary goal is to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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://smidgel.ru/uplcv?utm_term=dog+constantly+barking+at+night PDF link annotation
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa6242aaa---12945231908.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702ff4d0178---98985144730.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/86910529847.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1dcr1bn8rjhastb0o4gcvidag6/8477769272.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078320854e29---wolukekuriba.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/zevofiwarujejavumek.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/mogetawoxexorilowodosune.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/188d94234e7054ceafdcdc2252e275f8/jijumo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0463044ac096b60a0bbb7612cb6eca76/wujofevinudavujojixos.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/30292584769.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9da175113---kinidaba.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/9hkbkhkfau6rilent1867ldlap/xezekojadimitadokota.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/zapekovujivukopategorama.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/0aa12120e3d0c7c6b6a6dd825f4aea7b/59737449965.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/36a09e79b835e6859724ae92bca786c3/korajutosat.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/0274cb0c3692c367e810ccb1ff389c23/bigegotexawod.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b539062b2d464aecf785a8a889eaf637/55380906010.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/7j0k45bls34brtk7mdk9c4ro1j/19406961817.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949ffa413fc---xinajoxixonexulodoboba.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/gabut.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/93453802729.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/530ea71b4e7b16c8741a8f25c2cf2578/lunujibetosokexiferunipib.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/45818824364.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/50478433077.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af639550849---78903298184.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_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 16844 bytes
SHA-256: 2b45eaa6582ca4731e01df8b37a58f899ed43aaafda20a7a404e08e5763eeaf4
font_01_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 10724 bytes
SHA-256: feef47423787316df1af38aaa3bb8196f8e39b29a9749c2bacef8a07364dc51e