Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed899f0c66d64b0f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 10:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8e0b1a12b7536d0e02dd547a5a50f0c SHA-1: 7cd3a4cc221678140008aab770ea4e5b490a400c SHA-256: ed899f0c66d64b0fad999f3d09866168fcba2cd3a319693418f8507ed12b068e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. Several URLs extracted from the document point to potentially compromised hosting, suggesting an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ackerviewguesthouse.com/userfiles/file/51752225918.pdf In PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d554e884830---79214825398.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19d4872ba---8450682010.pdfIn PDF document text
    • http://rapet.hu/files/8966818682.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d126c8215f---45753830771.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/xolitasimetuzeloduj.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/revowigenumegirar.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/jimusubanufajabuvodubev.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210613225916.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/25231403798.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/ferelupokukifisex.pdfIn PDF document text
    • http://proxima-design.cz/files/file/rikatofadew.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/xujidusazem.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079473037094---79164409412.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16111071e9eec2---zepejofajep.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/43721346444.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/rebazo.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/24898507003.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/68923144868.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/somibipebimidu.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/24706975832.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/46723834070.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/tubakolutimelatalefe.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/69820579003.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070317472670554.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/11242500991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=formulaire+de+depot+photo+signature+pdf+antsPDF 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_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 18456 bytes
SHA-256: f83321491c17658e40b2be1d82ce1dcf8a01c045eeb18ea31ff12df915c48437
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 11020 bytes
SHA-256: 661d23118fd8eb5bb169ef2e6d8908e55fbac2e537f5d3e82c72d8b31d6462f6
font_02_sfnt_off00011800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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