Malicious PDF — malware analysis report

Static analysis result for SHA-256 12268c6f8c15efa4…

MALICIOUS

PDF

88.3 KB Created: 2021-07-03 11:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 474d9f9c0abfc10384cce77ebaeaaae6 SHA-1: ed0ba9818dbfa64d0d6142b39f42995a095f5252 SHA-256: 12268c6f8c15efa4416cb4f377a60630cd7f941773471f1383b91fd0c59d27a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=best+app+to+edit+pdfs PDF link annotation
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7b7db0225---pedazafopoxaroza.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/famuwijuzatipotodejomorur.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/nagezepafudowagawuvu.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/46207977176.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/kefajuxafadale.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fc6e4568d---55166657099.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a798cb1139f---32351568614.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/32339639597.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/2eb89b66331ca1e587187bd219dd2f71/wezedi.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f04a444be5---delenerapufim.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0497d7e7c---nurisedonas.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/gopelidokunutugore.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/6339f1a234eb3c835328a9c18548b8e7/73509128816.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1ae647abd---91559529262.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/babagevezi.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/af8366a2aeaedbb591a6129fbf3c6dd1/45526211495.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc81e34701---mobudukilufef.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/58071768325.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/4s1eah38gvci6sqlej0vnv7s96/nabugobigizobomozenavis.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16080921e0c6e9---foximerive.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160892eb813a8b---50965814503.pdfIn PDF document text
    • http://nensi.si/upload/file/xoxonorewod.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/40808374528.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199811935572.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/putikepamikunizofobi.pdfIn PDF document text
    • 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_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 16564 bytes
SHA-256: 94253113b0d8dd4765f2285700a5d3c5bf0ee5b853f3d90b040aad14114d2508
font_01_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C87 10296 bytes
SHA-256: bea664aed7076abbc8d2b947610f9ad83180736ac24f4262e5fbb96c184845e5