Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4abf9c979e3f5d…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 09:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7a3bc29e918c6831f7bf2e26b9ea4143 SHA-1: ee182cd7cde706c73d40b9d9d4f850ad25d9109d SHA-256: 0e4abf9c979e3f5d898826d99da199e46f4050ca6172b1818c66eba5c9ee901b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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 https://kop-trans.pl/uploads/userfiles/files/31645503830.pdf In PDF document text
    • https://minipowerpack.net/upload/files/mufaritimavuluv.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/wilixijilovorelutaxez.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/sekegoselib.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/kutaritedezifobefov.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/nasasobezegafokewenum.pdfIn PDF document text
    • https://theurbanthinktank.com/files/59422496270.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/mexopo.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/8f89f213ede9342ab93d85dea41392e2/95067242487.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109071959202379.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e49fdc3686---pasaloxenoniwoxulejugobi.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/12f3c02f8b4f3ca898cdf128a84043d6/84424356352.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/54537270283.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/13252097692.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/51617892682.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/6952770464.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/nepadokafabugev.pdfIn PDF document text
    • https://invest.pl/userfiles/file/56240954042.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/95680957928.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/71187555792.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/73219248358.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/50378852642.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/pitasexanu.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/31640450446.pdfIn PDF document text
    • https://ms1oke.com/contents/files/deboz.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/kijezoragopojituj.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/061229445454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=outlook+app+phonePDF 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_off0000b1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E3 14868 bytes
SHA-256: 7c8130f3a03b43f037ecf8e62b99eff471f0684a527d85eea37a501ba1a14f32
font_01_sfnt_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 10204 bytes
SHA-256: cb879eae1b3f0b7b62d2b229b4ba3dd57ebd2dd0569891048abf83a468cc24d0
font_02_sfnt_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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