Malicious PDF — malware analysis report

Static analysis result for SHA-256 e264fbe078728065…

MALICIOUS

PDF

61.1 KB Created: 2021-10-15 23:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: be95b358aec63842cef1a5cc28261ab6 SHA-1: 7e8edbf9f092571f0621a7c412a41f6139416dab SHA-256: e264fbe0787280656b17abca62b614cbdc10e0b8dbdcd6fd07bd69f098e58ea4
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document is designed to redirect users to a large number of potentially malicious or phishing sites. The ML classifier and ClamAV detection further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7260

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=special+occasion+speech PDF link annotation
    • http://architettoseneca.com/userfiles/files/77746735597.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/38490200389.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/52609010990.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/49753105989.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/1983699761.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/nedefiduzisovo.pdfIn PDF document text
    • http://sjanzee.nl/file/91179777265.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210906095154.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/94273970741.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/7529224649.pdfIn PDF document text
    • http://mfahk.com/upload/files/61528916788.pdfIn PDF document text
    • https://maviet.vn/upload/files/66677283783.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/84761934128.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/89230861409.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/xinuvudajidof.pdfIn PDF document text
    • https://termoformat.md/img/files/fulisomozabufedanap.pdfIn PDF document text
    • http://aqgwegfjdlk.handyfriendship.com/upload/files/bimosazojadivawenedu.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/60238523393.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5bba18a85---5793593840.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/mowamomumarusapu.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bedf7929be---wijirakedefa.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/90862619934.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/fikedev.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/45050320217.pdfIn PDF document text
    • http://aimic.com/userfiles/file/puxewanedexenusekum.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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 10348 bytes
SHA-256: e14a48096c27319650256409a8c2bba973109efcc99e7518a0c7dc034cff36bd

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