Malicious PDF — malware analysis report

Static analysis result for SHA-256 96058fe07995e8d4…

MALICIOUS

PDF

73.1 KB Created: 2021-09-20 07:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7854e8986bcd66b7e693ac4447567485 SHA-1: 7638cd1055e2ccad1eb7d1e721d303a3db70265c SHA-256: 96058fe07995e8d44ada4f250bc7fe1f18cba0b8a5ab5f98f24e2a4d2fe7e92a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious or phishing content, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://winhazel.com/indigo/ckfinder/userfiles/files/waviruxuw.pdf In PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/17953394248.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/monimupuvipex.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/tuzomelomorugejatuzewivaz.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613783c4335af---wixibufazibobemipip.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/sefunajenaropi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614363a59f97e---jatosawikurawurodiwebu.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4f018fb79c8370af43d77b7e390f84b6/nenepabuwekajubanuxebod.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/60942190843.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/3809145264.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/59284171526.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145610126223---vudozolup.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/3629923907.pdfIn PDF document text
    • http://chenruichem.com/upload/files/78319316461.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3a51d392b---25561266496.pdfIn PDF document text
    • https://majubesar.info/contents/files/luvevekuwanederasalebo.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/12868696828.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/xuvom.pdfIn PDF document text
    • http://jsjxh.org/filespath/files/20210901232530.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/914c1c0dff62d7a1d929a0cbad2d93a4/rewalixufesak.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/malofa.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/tifumajev.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/92426965629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=basic+complex+analysis+marsden+solutions+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_off0000bb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2C 11152 bytes
SHA-256: 9140eea8e3e295eeaaa7fbbda18006526f66730e33dfc24fb50234c71f630ac0
font_01_sfnt_off0000d548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 15780 bytes
SHA-256: 4e60e3e75fe0bd013fa5b1dd64ea84af9cdd17929b5b6679d84063b773d3e9a3
font_02_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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