Malicious PDF — malware analysis report

Static analysis result for SHA-256 9298bdd498635fbd…

MALICIOUS

PDF

82.2 KB Created: 2021-07-29 15:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 749fa20f9cd6104c06c2dbbda95950de SHA-1: 0f8e5324be2aba3ab3eed284ad49cee22e1334e3 SHA-256: 9298bdd498635fbd4fb05d839274d2d79b1673fb1a5fada3db868baa417c3793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure suggests it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608365c700042---10061381025.pdf In PDF document text
    • http://progetec.org/userfiles/files/9474245308.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/34338493799.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/62279951809.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e1d3f348e53---15454530907.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a69c205259b---76835442483.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/kudazetemubitite.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/kuvujudisana.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/jogekazuzebunezuwoxibuper.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/78500327615.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/68853650063.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/50576626729.pdfIn PDF document text
    • http://zahradysnapady.cz/soubory/files/vuxufubuxafadugi.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/41214634042.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/nqoq28nfquuakbeaoo3p3tv5q6/depawiguf.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/37425673730.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/momulilubevojawinaje.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9d6a64ce3---91308309179.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/93583251505.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-12/20210612070346268418.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/72f7430de25f034960c8f8ee0a96c370/dukubokigixuxofuloza.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160738e029345d---gipejorefunuz.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/81bafe52943037b9f5fd768fa17e1c7a/9051756115.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/92aabddc17db6939a9c40c383ed535fd/97978297051.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/82pffa845aj5sgb7eptd21evk2/pomonifako.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/19916230691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=o+que+foi+a+confer%C3%AAncia+de+berlimPDF 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_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 10944 bytes
SHA-256: 8d79212d11ee6d1e503dad6b41a367fe1234024a296dfc7d67da2e65b3db4068
font_01_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 18956 bytes
SHA-256: df36bab163ddc6032c3184f649dc14951d040adedac6a3361ec682ef687cfc7b
font_02_sfnt_off00012023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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