Malicious PDF — malware analysis report

Static analysis result for SHA-256 590bdf61c07cdd7d…

MALICIOUS

PDF

79.9 KB Created: 2021-09-13 08:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3dc399ff1aceeeafe8737a2ab2ee3909 SHA-1: 76278c721debcfbec1fc99f2184247ce355d078a SHA-256: 590bdf61c07cdd7d3292df2a5070906e20e1f9dbead56ba8862f955d596c411b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. 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 a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://radiopoint.cz/userfiles/file/25332907106.pdf In PDF document text
    • http://avision-italia.com/userfiles/files/padamopen.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/703034294d56fac355c6bd3fd5950d66/dazukodikonunole.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/naxubesufi.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/84164022557.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/temirananagafovolegek.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/27942347266.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/fexolidulizuvojiguzuvisuv.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/38929187358.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613406317faf8---gafemuxofa.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/mipifus.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/72333448454.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/tatasakegeweduxizuwu.pdfIn PDF document text
    • http://runo34.ru/attachments/file/sofagutaputo.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/weguwojexekirajap.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/laginopukotisumov.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/vikufonitubanar.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/4491918015.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/kudofawavugitibegipa.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/fetaxevevepub.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/79084688526.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/vexemo.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/wameratijutimutajar.pdfIn PDF document text
    • http://cissi.it/userfiles/files/10905352617.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/vutibem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=my+hero+academia+heroes+rising+dub+123moviesPDF 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_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 11432 bytes
SHA-256: 618a54482b8f0622a75f746a1b80b903d0726b9f1743dce0a238f4409bac79fe
font_01_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 18552 bytes
SHA-256: 48bb252f6c3385301bd780ca76d27147877114bee128c88947525ba95c08fb6c
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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