Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb68f9b66d91fb7…

MALICIOUS

PDF

80.3 KB Created: 2021-09-13 23:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5569e21665f2efb3f66fd9921086b1d5 SHA-1: b9f78f37ae6d071ea2e5662d51fc19d0627525f7 SHA-256: dcb68f9b66d91fb7de33a85766d139d5691d9be5cceb1fa7aedd3c2846cc1d2d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The presence of a link farm heuristic further supports the idea that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://pixomot.ru/uplcv?utm_term=shrek+full+movie+stream PDF link annotation
    • http://factory-01.com/js/upload/files/nibusutid.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/8517555791.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/daxoxuxiwes.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/5082114154.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/riwesaboxopuxepi.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/jegafojuguxukiwegiwaxo.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139e7570d90e---wugamumubujikoveriwesu.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/pigigabizubavozilon.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/6824946512.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/ribupukul.pdfIn PDF document text
    • http://wohntraumgmbh.at/1047845003.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/34651322468.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/76726022787.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/39508152211.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/12624186873.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/22791215967.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/xozugunijavexos.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/41620800945.pdfIn PDF document text
    • http://capital96.com/userfiles/file/dogolo.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/muvigapuralitawureg.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/80302011788.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/30822930664.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/rudegamekijonifipafaf.pdfIn PDF document text
    • http://hexindechem.com/upload/files/viloto.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_off0000d5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BD 10708 bytes
SHA-256: ce974c402f0e7e947c84cd6d07b168907ffae691894bd514454a78b97d31b0ba
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 17880 bytes
SHA-256: d218ff9388d5e1f410efa81a4dcbbc93b2ed61cb3492c2988d91be310b6ce1b1

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