Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7112a74d6bedaeb…

MALICIOUS

PDF

79.6 KB Created: 2021-07-22 16:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95b34368a8719779f81dd53bc18b5c6c SHA-1: 5695977079b04c96743bb74a30b6efb7af19f255 SHA-256: d7112a74d6bedaebd1f57c251c18c02aa76be391af7dc7890740a8a751fd4ed8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links pointing to various compromised websites, many of which are hosting other PDF files. This suggests a link farm or SEO poisoning attack. The ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

Heuristics 4

  • 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 http://ajivikafinance.com/userfiles/file/47608373734.pdf In PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/f4a951155e5ac8a46954e4595d5ad5d0/37096808405.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/99461753993.pdfIn PDF document text
    • https://apronorte.org.br/ckfinder/userfiles/files/78598115726.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/58cqkh1b79qahm7c30sln1f423/27717943443.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/40672185425.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/c44e03a4b7af2b0fdc49fde0aa2473a0/94866989371.pdfIn PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/23862342605.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092745e6054c---lekokanatunu.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/gg74sn5cnqkginfp7ae83qcr4e/pagolosukuwudow.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/49170636239.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab2c6ae871---95301375318.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/88411027956.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/sotizokenesi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/elb1rvrqnc0s6lik6ho671sk53/mekisidelebijonoxi.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160738abe450c6---zotunuramuz.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740c867833---ruzixerafedox.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608769b975260---6037136256.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6773c9efc7a4bf3d93d324af69dc53c4/12561813768.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d472aa37f5---28875557217.pdfIn PDF document text
    • http://meta-min.com/files/fefaxaropajubobewoluz.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/69795138733.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/gemeruri.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbce96ccc---rukuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=xbox+360+xex+games+downloadPDF link annotation
    • 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_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 5888 bytes
SHA-256: d7ba95bf6ff676ce3a47e989aa6ebd36e35898b1d9be26cc9d702464f9d506c3
font_01_sfnt_off0001179e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179E 11100 bytes
SHA-256: 64bb4c7a52493390bed0b980397bff9a5941e8b98f394d8099bef54b13bdf6c3

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