Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe586b59eb5ea547…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 22:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bc38398d5cfffcf0a61bc2d8dc8b1d6f SHA-1: 6fc0f1a1d71eb0134f74f6b725484e37a55f9333 SHA-256: fe586b59eb5ea547840a732a5371ee911b47c8231f8e16449feb1c3e4eb03801
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, with numerous distinct hosts and embedded URLs. While no executable scripts were extracted, the structure and URL patterns suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://falerisztika.hu/tmp/30308480988.pdf In PDF document text
    • http://warehousetraining.ie/images/dazulam.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/84355380102.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/33496120327.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/zesexipo.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/14821775070.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/tefufisazawej.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/monunusodasiju.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/17013809022.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/24263573565.pdfIn PDF document text
    • http://12shio5.com/contents/files/17125019415.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/63057271.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7d481e101---43109226077.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/lewumubemer.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/tavugirufepagapawido.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/zowuziwilef.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/55907753.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/26547046641.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/31105405624.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/bixuvewixafelukanob.pdfIn PDF document text
    • http://hkwwta.org/userfiles/66158218745.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/36003963991.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/98277334715.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/97105506084.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/fifaxunowiwudeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=dare+modal+verb+examplesPDF 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_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 18236 bytes
SHA-256: 4170c6702c4005897d438acf1a925194ac0b85f7cc43abfccc8c4e11af155cd4
font_02_sfnt_off0001228c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228C 10568 bytes
SHA-256: d787eeeddd185c45e506b6e7aed7d87ad367f919c8319cb3471720cad77a86b7

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