Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee88ad68900e3ac7…

MALICIOUS

PDF

85.2 KB Created: 2021-08-17 23:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ee5891a5a737f7ce8beafe1ee9102eaa SHA-1: b805f8169438c6f6a0f32f73c6fe453d84e23afd SHA-256: ee88ad68900e3ac7f1837a33f1e420e2485b17548cdcfbd5a1c2faeddf59a753
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as containing a link farm pointing to potentially compromised or disposable domains. The ML classifier and ClamAV detection further support its malicious nature. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9051

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://podiummagazinenews.com/ckfinder/userfiles/files/67619845715.pdf In PDF document text
    • https://bilegt.mn/userfiles/files/36365767629.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/kisusexoz.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/49954110836.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/zuxapivametezivikijulefu.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d835fc9d1d---sevogo.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0aac72444---10144513715.pdfIn PDF document text
    • http://hydrem.ru/images/file/werakedexima.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/vifojulak.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/14655665894.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160967a432e793---90878803337.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/newizozefalusonuwoxigufat.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/59431499266.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9f8564052e---tomusomalosoliruzoxugixik.pdfIn PDF document text
    • https://stvorki.ru/files/file/93106685133.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc66dd8d60---biloxi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59bbfe7f80---tevilevupozenum.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/71191109660.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ca7d3c621dbac19fcfafe03e77295288/liwaxugurezun.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/kanofabamejefexi.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3d7fdf930---fizimoruwuragamud.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/48417912914.pdfIn PDF document text
    • https://olterus.org/contents//files/zurutimenanugagejijuje.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/o9s0fs8npmdag5fjed1bc2il4f/42640269700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=elena+putina+wikipediaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 23780 bytes
SHA-256: 31a6361d826b71ccecaa277feb466fed76063a6bdb1bdbbfe284323bd8449079
font_01_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 10260 bytes
SHA-256: 9f4d09f4d56d97be9f081b98e74ea24392c6493d52878c10f90f803956ee3609

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