Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeda0f5be20e4fb1…

MALICIOUS

PDF

78.3 KB Created: 2021-09-07 10:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ffa59bda8b91043f17b764d580ad2ee SHA-1: 137a09c0a17f76dd25a3b69427647b08cf49784a SHA-256: eeda0f5be20e4fb13ce16e75d66be302fecdb0db9cbe626e44c0496482285442
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs hosted on potentially compromised sites reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607137cf10dba---fovugosalul.pdf In PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/4d939094f3866e18aada7ba95924ec10/93161313774.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9f68b52c8d88e7ee322beac56ee1d453/54074819024.pdfIn PDF document text
    • http://bociany.sk/media/file/74131226766.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/f6e304b0a2e53de73dd483d5d1fbc3cd/71923365933.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/af22c71f71a60abcedf1fd82a47052ed/jiritosimufukat.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/59593603425.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/88317251131.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/52831321957.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a81ec695bef---kuranizuj.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/wupogigupimizunopi.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2428baa8d---91522136447.pdfIn PDF document text
    • https://jagamimpi.net/contents//files/ripul.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/75549317675.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba321384e65---16215716403.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7b91b04c340e2497d235cdc77d9c5650/57586438215.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/b67aea294715acb53ef2c83e3b91f6f3/14941629003.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a1e722cd0---filiziv.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a55ff3635d3---dawuxeditevizesonaxenetib.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16114a1365c8bd---33588518577.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/zulakutixizes.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/cf502d91f974ee102469f22b5d3beb16/11266121380.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/nowaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=achilles+bursitis+exercises+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 17088 bytes
SHA-256: 87991767180354d49f26d23926181347a702ef2acbf7efe02f141d5f090267ba
font_02_sfnt_off0001136a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136A 10652 bytes
SHA-256: 19b1cc692de57f58148c26b5438a8d503b8cf0cd88a95526bf1e37c243cb8961

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