Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c624799893c72c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 09:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7c950d59ff5c1bec5332b7e9aed75ff7 SHA-1: 8b427afe4c850ae59cbbfd92bf4de4e13169788d SHA-256: 96c624799893c72c4ae7c4412237986b7ea4a2fb2269d3c6602f2a5036b52d6a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as indicated by the numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://m-astar.com/UserFiles/files/nikosuz.pdf In PDF document text
    • http://wahluenfty.com/userfiles/kovamatozagevakevopiki.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3d8d71f6---62574800161.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/kuxivijepopovarefoti.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/nixisejufezubisebixip.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/1gvjh4pk9pnfohfcjbl3sbd2bl/nesuzamulemajejino.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/jugazawogimunuwominuv.pdfIn PDF document text
    • https://reniuved.it/file/refir.pdfIn PDF document text
    • http://sushi-belovo.ru/files/didenujo.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/bitabejozajibejokaped.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/3a5ea33f492bff8ccc397575c1e08351/memubutemalemig.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160769f3f3079c---marojajafega.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/99214580110.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/8709624343.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e49b54f33aa---83780916852.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/lixiwexijakemene.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/jutaweterexufir.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/26660ea96f0ef6bbbc84298dbd7f2583/60599174434.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/f7a82b5ae58ff7eb9bf117ac51e821f4/rudewidorik.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/negapikofevul.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/0b6436351dea543a488986f322e139af/siluzolokona.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/54245853578.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/79111811979.pdfIn PDF document text
    • http://livestocktool.com/d/files/38176525779.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d45413b9aa---97614697159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pdf+resize+online+100kbPDF 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_off0000de0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 10552 bytes
SHA-256: 862c951a1ad7ba3a1fdc855b0612b56459e66ca43cc9bbded81bbbf7e51539cf
font_02_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 18600 bytes
SHA-256: ec6c916824b9f1a52038a47c19d7e989a2a51383d233c9b8a8acbc2e1c722f3e

Open this report in the interactive analyzer, or submit your own file for analysis.