Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c82e39645859f7…

MALICIOUS

PDF

81.2 KB Created: 2021-09-09 13:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bca2fff910ea7cd0f8b86f71b9471891 SHA-1: 17a918a9ceacc5498d523f144e914f7e74b4cd68 SHA-256: 69c82e39645859f7a4ab73c12ca160b2d424b945491e8fff89058cc2cd911c47
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://pistant.ru/uplcv?utm_term=vidmate+app+old+model PDF link annotation
    • http://sztarmedia.hu/_user/file/fadesubewuviwas.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/xasatesipirutasose.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sulexupasatusifedosima.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/medavexikawasojuforemerer.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/zapatizidamisizovipije.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/lopewerasuvowowame.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/99153164042.pdfIn PDF document text
    • https://cape-electronics.com/media/file/55454167237.pdfIn PDF document text
    • https://bursac.net/userfiles/file/20877743016.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/nofit.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/datano.pdfIn PDF document text
    • http://soc-in.com/data/media/files/bunenefudajubifinixote.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/19754859712.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/71d7c3e10271fb824eaaa8a13a6db711/37982626613.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/fowojasirisurenifogifowaw.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613260ed9c4f3---guferomokeke.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/zinifuge.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/71290268080.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/18826719471.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/86040941139.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/vudokunuvifuvateno.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/zanirunirosuvokun.pdfIn PDF document text
    • 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_off0000dbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 10152 bytes
SHA-256: 04b0fb4ee3172df0029d1d9fbed7086cf705c9eb0a9382197d640ded24fbd46d
font_02_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 17444 bytes
SHA-256: 090efd1ab8d0d976db99e78fc76ddbffc252e166b2d9ea621cf43053e1cdd934

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