Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de7a1759d0d4d7e…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 03:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b5758bd5f45d947f0eec99ab1fdc05b2 SHA-1: 5eb07a9cdcb26beb59d58e0253a44baf9b49aac1 SHA-256: 1de7a1759d0d4d7e2201256b6248382ae6d3a3de3bd01b4c18bb3f76f5acc8fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of multiple links pointing to compromised or disposable hosting, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded JavaScript likely facilitates the redirection to one of the identified malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • 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://inverpalmas.com/aym_image/files/livumefedowo.pdf In PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/83656047930.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da88550b17---92424364540.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160af383dc1e62---97284540248.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/gitewalelozex.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/jixinesovosan.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/5848891836.pdfIn PDF document text
    • http://benetalent.com/upload/files/nizowubizadimawegi.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/42037074041.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609845246409b---mibovozuxoko.pdfIn PDF document text
    • http://e-hane.com/files/72943329579.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/fe0a35cc442471f822bfb973c15de749/dixigodixofoxikija.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/46c3e8402c05b38e86079eda77edee46/zinibi.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/497d4bef32954cc744148e434f4f0fbf/4266654399.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/sinojidamonogojixewuzow.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/wodesefafupode.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/kojenelenazurat.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/keterofow.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/gosedejepekoxelis.pdfIn PDF document text
    • https://kleinimmobiliere.lu/userfiles/files/46380194541.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210620_B65090918D7AE61E.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608bea23f2206---bebufiburav.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/nedavitokibepogikexeli.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f28078a7534f61640ec54343fc0b7e8f/domulavorasitubowoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=asuntos+regulatorios+en+la+industria+farmaceutica+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_off0000d5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 11044 bytes
SHA-256: 67c62c476c49b095a0b1c620a69fadc34370ae0323dbb282847ca2873c5a56d5
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 18868 bytes
SHA-256: e21c867fb72d64ed27a4f8aed12ff791112d128f5948f737aeb0e421022ec57e
font_02_sfnt_off00011f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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