Malicious PDF — malware analysis report

Static analysis result for SHA-256 32378f0f42da0371…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 23:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a2c8e48da7979485222f7fc9a25f88bb SHA-1: 49a87862c2edf3e11a1e820ff90d072667ad4ed7 SHA-256: 32378f0f42da03713265fe30f3b1d1cb8ab02c47f2372702eb89eb9a2df5418b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://szigetkozpalinka.hu/userfiles/file/95685544461.pdf In PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/13061921360.pdfIn PDF document text
    • http://muszempilla.com/files/file/29745935349.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/bewajun.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/lufijiw.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/koloderuxa.pdfIn PDF document text
    • http://sgpeo.pl/users/file/74401022482.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/bitanelomilobujatabuz.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/jetebiwidevokodugimo.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/27752103545.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/kijidafelifu.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/kopakuraxexemolezakukug.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/vkiniknmqor6uf92mujrdqfg92/puzitugeramuwerox.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/kimiripokiwawanidemapuwo.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/43030358338.pdfIn PDF document text
    • https://epm.jot-solutions.com/files/12984175017.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/89943743391.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/zibotamoro.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/nolaluxozon.pdfIn PDF document text
    • https://baongochoa.com/upload/file/kajesoduxeluw.pdfIn PDF document text
    • http://citra.cl/userfiles/file/wanelakazap.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/femisovigojonavigula.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/2d67691983facbefcc4e3d062c547e22/napekoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=paw+patrol+printables+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_off0000b218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB218 14752 bytes
SHA-256: c84149714ffc447264a6b2e84812d79f239f1fd61646f896cb3d37e0d2b6bfae
font_01_sfnt_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 10716 bytes
SHA-256: ccd6d6582d81ef7ba3037dc4d0b8ec73ced2856f2f65da3e1822779808f4ceb6
font_02_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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